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CCNA Server Hardware Installation Management Questions

75 of 93 questions · Page 1/2 · Server Hardware Installation Management topic · Answers revealed

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1
MCQeasy

A technician is installing a new server in a rack. The server's rail kit includes both a static rail and a sliding rail option. The server will be frequently accessed for maintenance, and the technician needs to pull it out of the rack to service internal components. Which of the following rail types should the technician use?

A.Static rails
B.Cable management arm
C.Sliding rails
D.Tool-less rails
AnswerC

Sliding rails allow the server to be pulled out of the rack like a drawer, providing easy access to internal components for maintenance. This is ideal for servers that require frequent servicing. Static rails do not allow the server to slide out, making access more difficult. Therefore, sliding rails are the correct choice for this scenario.

Why this answer

Sliding rails are designed to allow the server to be extended out of the rack for easy access to internal components. This is essential when frequent maintenance is required. Static rails would require complete removal of the server, which is impractical.

Tool-less rails and cable management arms serve different purposes and do not provide the sliding capability needed.

Exam trap

The trap here is confusing tool-less rails with sliding rails; tool-less refers to installation ease, not the ability to slide the server out.

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2
MCQhard

A server administrator is replacing a failed hot-swap SAS drive in a RAID 5 array. The drive bay is labeled with the failed drive's slot number, and the array is currently degraded. The administrator pulls the drive but realizes the replacement drive is a 4TB SAS drive while the failed unit was 2TB, and the remaining drives in the array are 2TB. The controller supports online capacity expansion but the array is not configured for it. Which of the following should the administrator do?

A.Insert the 4TB drive and then run an offline capacity expansion to grow the array
B.Insert the 4TB drive and let the controller rebuild the array at 4TB capacity
C.Insert a 2TB SAS drive matching the existing members and allow the array to rebuild
D.Replace all remaining 2TB drives with 4TB drives simultaneously to match the new drive
AnswerC

RAID 5 requires all member drives to contribute equal capacity, so a matching 2TB SAS drive rebuilds the array correctly and restores redundancy. The controller will reconstruct the missing data from parity on the surviving drives. Using an equal-or-larger drive is acceptable, but a matching drive avoids unused capacity and any expansion steps, making it the cleanest resolution for a degraded array.

Why this answer

In a RAID 5 array every member drive contributes the same amount of usable capacity, and the array size is bounded by the smallest drive. A matching 2TB SAS replacement rebuilds the missing data from parity and restores redundancy without unused space or unsupported expansion steps. Larger drives can be used, but only if capacity expansion is configured and performed after the rebuild completes.

Exam trap

The trap here is believing a larger replacement drive automatically increases array capacity, when RAID 5 capacity is set by the smallest member.

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3
MCQmedium

A technician needs to install a PCIe 4.0 x16 network adapter into a server that has a single physical CPU. The server has three PCIe 4.0 x16 slots: slot 1 is connected directly to the CPU, slots 2 and 3 are connected through the chipset. The adapter requires maximum bandwidth and low latency. Which slot should the technician use?

A.Any of the three slots will provide identical performance.
B.Slot 1
C.Slot 3
D.Slot 2
AnswerB

Slot 1 is directly attached to the CPU, providing the lowest latency and full bandwidth without chipset arbitration. For a high-performance PCIe 4.0 x16 adapter that requires maximum throughput and minimal delay, the CPU-attached slot is optimal. Using a chipset-attached slot would introduce additional latency and potential bandwidth sharing with other chipset devices, which could degrade performance.

Why this answer

The CPU-attached PCIe slot provides the most direct path to memory and the processor, minimizing latency and maximizing available bandwidth. Chipset-attached slots route traffic through the chipset, which can add latency and may share bandwidth with other devices. For a high-performance network adapter that requires maximum throughput and low latency, the CPU-attached slot is the correct choice.

Exam trap

The trap here is assuming that all PCIe x16 slots perform identically because they have the same physical size, ignoring the electrical lane routing differences between CPU-attached and chipset-attached slots.

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4
MCQmedium

A technician is adding a second CPU to a dual-socket 2U server that previously ran with a single processor. After installing the matching CPU and heatsink, the server POSTs but the operating system only reports half of the newly installed memory, and the BIOS memory map shows several DIMM slots as unpopulated. Which of the following is the MOST likely cause?

A.The DIMMs installed on the second CPU's memory channels are not seated or are in the wrong slots.
B.The second CPU requires a BIOS firmware update before memory can be enabled.
C.The new CPU is not on the server's hardware compatibility list.
D.The memory controller interleave setting was disabled in the BIOS.
AnswerA

Each socket owns a distinct set of memory channels and slots. When a CPU is added, the DIMMs must be populated in the slots assigned to that socket following the vendor population order. DIMMs left in the first CPU's slots or seated poorly cause the BIOS to mark those channels as unpopulated, so the OS sees only half the memory even though POST succeeds.

Why this answer

Adding a processor activates a second set of memory channels, each with its own required slot population order. If the DIMMs are not moved into the slots owned by the new socket, those channels train as unpopulated and the OS sees only the memory attached to the original CPU. Verifying the server's population table and reseating DIMMs in the correct slots resolves the missing capacity.

Exam trap

The trap here is assuming a POST-successful CPU upgrade automatically activates all installed memory, when memory is actually partitioned per socket and must be populated in that socket's designated slots.

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5
MCQmedium

A server administrator is replacing a failed hot-swap SAS hard drive in a production server that uses a hardware RAID controller. The drive is part of a RAID 5 array. After physically swapping the drive, the administrator notices the drive activity LED is blinking green but the array status still shows 'degraded' in the management software. Which of the following is the MOST likely cause?

A.The drive was inserted into the wrong bay, so the controller cannot map it to the array.
B.The RAID 5 array requires a manual rebuild command to be issued from the controller BIOS.
C.The RAID controller is performing a rebuild but the management software has not yet updated the status.
D.The replacement drive is not a certified spare and must be manually added to the array.
AnswerC

When a hot-swap drive is inserted into a RAID 5 array, the controller often automatically starts a rebuild. The blinking green LED indicates drive activity, which is consistent with an ongoing rebuild. The management software may not immediately reflect the new status due to polling intervals or cache delays. The array will show 'degraded' until the rebuild completes and the status updates.

Why this answer

The blinking green LED indicates the drive is active, which is consistent with an automatic rebuild in progress. RAID controllers often start rebuilding immediately upon insertion of a replacement drive, but the management software may lag in updating the array status. The array remains 'degraded' until the rebuild completes, so the administrator should monitor the rebuild progress rather than assuming a failure.

Exam trap

The trap here is assuming that a blinking LED means the drive is faulty or not recognized, when it actually indicates normal rebuild activity.

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6
MCQmedium

A systems administrator is configuring a new server that will host a mission-critical database. The server has two redundant power supplies. The organization's data center has two separate power circuits, each backed by a different UPS. Which of the following power configurations provides the BEST redundancy?

A.Connect each power supply to a different power circuit.
B.Connect both power supplies to a single, high-capacity UPS.
C.Use a single power supply and keep the second as a cold spare.
D.Connect both power supplies to the same circuit to balance load.
AnswerA

This is the best practice for power redundancy. It ensures that the server remains powered even if one entire circuit or UPS fails.

Why this answer

Connecting each power supply to a different power circuit ensures that if one circuit or UPS fails, the server continues to receive power from the other source. Option B is correct because it eliminates single points of failure in the power path. Option A is incorrect because connecting both to the same circuit creates a single point of failure; a circuit trip would take down the server.

Option C is incorrect because using a single live PSU with a cold spare does not provide automatic failover and would cause downtime if the active PSU fails. Option D is incorrect because a single high-capacity UPS is still a single point of failure, and does not protect against UPS failure or circuit issues.

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7
MCQmedium

A server administrator is configuring RAID for a new file server that will store large media files. The server has six 4TB SAS drives and a hardware RAID controller with 1GB cache and battery backup. The administrator needs a RAID level that provides fault tolerance for up to two drive failures and maximizes usable capacity. Which of the following should the administrator choose?

A.RAID 5
B.RAID 10
C.RAID 6
D.RAID 0
AnswerC

RAID 6 uses double parity, allowing the array to survive two simultaneous drive failures. With six 4TB drives, usable capacity is 16TB (4 drives worth of data), which is higher than RAID 10. It balances fault tolerance and capacity, making it suitable for large media storage where capacity and reliability are important.

Why this answer

RAID 6 is the correct choice because it provides double parity, allowing the array to continue operating after two drive failures. It also offers better usable capacity than RAID 10 with the same number of drives. RAID 5 only tolerates one failure, and RAID 0 offers no redundancy, so neither meets the requirement.

Exam trap

The trap here is assuming RAID 10 can survive any two drive failures, when it can only survive one failure per mirrored pair, and it reduces usable capacity.

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8
MCQhard

A server administrator is installing a new internal tape drive into a server that will be used for backups. The server has an available parallel SCSI (SPI) interface on the motherboard. The administrator connects the tape drive to the SCSI bus but forgets to install a terminator on the last device. Which of the following is the MOST likely result?

A.The tape drive will operate at reduced speed but without errors.
B.The tape drive will not be detected by the operating system.
C.The SCSI bus will experience signal reflection and data corruption.
D.The server will fail to POST.
AnswerC

Proper termination absorbs signal reflections at the ends of the SCSI bus. Without a terminator, signals reflect, causing data corruption, parity errors, and unreliable operation. This is a classic symptom of missing termination on a parallel SCSI bus.

Why this answer

Missing termination on a parallel SCSI bus causes signal reflection, leading to data corruption and errors. Termination is required at both ends of the bus to maintain signal integrity. The tape drive may be detected but will likely experience intermittent failures during backups.

Exam trap

The trap here is assuming that missing termination only affects the new device or prevents boot, when it actually corrupts the entire SCSI bus's signals.

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9
MCQmedium

A data center technician is installing a new 2U server that will host a virtualized environment. The server supports hot-swappable 2.5-inch NVMe drives in the front bays, but the operating system does not detect any drives after installation. The technician confirms the drives are properly seated and the backplane is connected to the motherboard. Which of the following is the MOST likely cause?

A.The NVMe drives require a U.2 to M.2 adapter to be recognized by the backplane.
B.The drives must be initialized in the RAID controller BIOS before they appear to the operating system.
C.The drives are not compatible with the backplane because they are SATA instead of NVMe.
D.The backplane's NVMe ports are not connected to the motherboard's PCIe lanes or the correct HBA/RAID controller.
AnswerD

NVMe drives require a direct PCIe connection. In many servers, the backplane uses SAS/SGPIO or OCuLink cables to connect to specific PCIe ports on the motherboard or a tri-mode RAID controller. If these cables are missing or connected to SATA-only ports, the drives will not be detected. This is a common oversight during installation and matches the symptoms.

Why this answer

NVMe drives communicate over PCIe, and in a hot-swap backplane, the backplane must be cabled to PCIe lanes on the motherboard or a compatible controller. If those cables are missing or misconnected, the drives receive power but no data path, so they are invisible to the OS. Verifying the backplane cabling is the critical step before assuming drive or controller failure.

Exam trap

The trap here is assuming that because the drives are seated and the backplane is powered, the data connection is automatically correct.

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10
PBQeasy

A technician receives an urgent alert that a critical file server at a remote branch office has gone offline and is unreachable over the network. The server is accessible via out-of-band IPMI, which indicates that chassis power is present, but the power LED on the server is blinking amber instead of steady green. The IPMI system event log reports "System board voltage regulator failure" as the last critical event before the failure. Attempts to use the remote KVM show no video output, and Wake-on-LAN commands have no effect. The branch office has no on-site IT personnel; the only staff are general office workers with minimal technical training. The earliest a field technician can travel to the site is 48 hours. The main office has an identically configured spare server and a backup image of the file server's system disk. The branch office staff can follow simple plug-and-play instructions if provided. Which of the following is the BEST immediate course of action to restore the file services with minimal downtime?

A.Order a replacement system board and express ship it to the branch for a technician to install later.
B.Ship the spare server and a pre-configured backup image to the branch office for local staff to swap.
C.Instruct a non-technical employee at the branch to reseat the power supply and clear the error log.
D.Dispatch a technician with a replacement voltage regulator module for on-site repair.
AnswerB

Why this answer

Given the voltage regulator failure on the system board, the server is not repairable remotely. Shipping the pre-configured spare server allows non-technical staff to swap the entire unit by following simple cabling instructions, restoring service quickly without waiting for a technician. Option A is correct because it minimizes downtime by leveraging available resources.

Option B is incorrect because voltage regulator modules are rarely field-replaceable; they are integrated into the motherboard, and dispatching a technician would take 48 hours plus repair time. Option C is incorrect because reseating the power supply is unlikely to fix a system board voltage regulator fault, and could cause further confusion for untrained staff. Option D is incorrect because ordering a replacement board and waiting for a technician to install it would take even longer, extending downtime unnecessarily.

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11
MCQeasy

A technician is preparing to rack a new server and needs to confirm the cabinet can support its weight and power draw. The server's documentation lists a maximum of 750W and a fully loaded weight of 30 kg. Which of the following should the technician verify FIRST?

A.The server's acoustic noise rating and the data center's ambient humidity
B.The cabinet's static and dynamic load ratings and the available PDU circuit capacity
C.The operating system version the server will host and its licensing tier
D.The color of the server's front bezel and the rack's U numbering scheme
AnswerB

This is correct because the cabinet must physically support the chassis weight, including when rails are extended, and the PDU must supply the server's 750W maximum without overloading the branch circuit. Confirming both ratings before installation prevents structural failure and electrical overcurrent, which are prerequisites for a safe racking procedure.

Why this answer

Before racking a server, the technician must confirm the cabinet can support its weight, including during rail extension, and that the PDU and branch circuit can deliver the documented maximum draw. These structural and electrical checks are prerequisites. Bezel color, OS licensing, and noise or humidity ratings are secondary considerations that do not prevent physical or electrical failure.

Exam trap

The trap here is skipping straight to software or cosmetic details and overlooking that a cabinet's load rating and circuit capacity are hard physical limits.

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12
MCQeasy

Refer to the exhibit. A server in a well-maintained data center has triggered upper critical and non-recoverable temperature alerts for CPU1. The server's chassis fans are operating at full speed, and the data center ambient temperature is normal. Which of the following is the FIRST action the administrator should take?

A.Open the chassis and verify that the CPU air baffle/duct is in place.
B.Check for failure of the liquid cooling system for CPU1.
C.Replace CPU1 because the high temperature indicates an internal short.
D.Install additional high-speed fans to increase static pressure.
AnswerA

Air baffles direct airflow over the CPU heatsinks; if missing or displaced during a previous service, the CPU can overheat even with fans at full speed.

Why this answer

Correct: Missing or improperly installed air baffles/ducts are a common cause of CPU overheating, especially after maintenance. Option A is wrong because if other components are fine, a liquid cooling failure is less likely and more invasive. Option C is wrong because adding extra fans doesn't address the root cause if airflow path is broken.

Option D is wrong because a failed CPU almost never causes overheating; a failing CPU usually causes crashes, not thermal runaway.

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13
MCQhard

A server administrator is adding a second CPU to a dual-socket server that currently has one CPU installed. The server boots with one CPU but fails to POST after the second CPU is installed. The administrator verifies the CPU is seated correctly and the socket is clean. Which of the following is the most likely cause?

A.The second CPU is not on the motherboard's qualified vendor list for dual-socket operation.
B.The server's power supply wattage is insufficient for two CPUs.
C.The second CPU requires a different heatsink than the first CPU.
D.The server requires memory to be installed in the slots associated with the second CPU before it will POST.
AnswerD

On dual-socket motherboards, each CPU has its own memory channels and slots. If no memory is populated in the slots mapped to the second socket, the system will fail to POST because that CPU cannot initialize its memory controller. Installing at least one DIMM per memory channel for the second CPU is required for a successful dual-socket boot.

Why this answer

Dual-socket motherboards assign separate memory slots to each processor. When a second CPU is installed, the system expects memory in that CPU's associated slots; without it, the CPU cannot initialize and the server will not POST. Checking that each populated socket has memory in its corresponding channels is the key step for this scenario.

Exam trap

The trap here is focusing on CPU seating or power while overlooking that each processor on a dual-socket board requires its own memory population to complete POST.

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14
Multi-Selecthard

A server administrator is tasked with installing a new PCIe expansion card into a rack-mounted server. The server will be used in a data center with limited airflow. Which of the following should the administrator consider to ensure proper installation and cooling? (Choose two.)

Select 2 answers
A.Set the expansion card's fan speed to maximum using the server's management software.
B.Ensure the expansion card is compatible with the server's PCIe slot type and generation.
C.Install the card in the slot closest to the power supply to reduce cable length.
D.Remove the server's top cover to improve airflow around the expansion card.
E.Verify that the server's air baffle is installed correctly to direct airflow over the expansion card.
AnswersB, E

Compatibility is essential: a PCIe card must match the slot's physical size (x1, x4, x8, x16) and generation (e.g., PCIe 3.0 vs 4.0) to function. Installing an incompatible card can damage components or result in non-operation. This is a fundamental requirement for any expansion card installation.

Why this answer

Proper installation of a PCIe card requires verifying compatibility with the slot and ensuring the server's air baffle is correctly installed to direct airflow. These two steps address both functional and thermal requirements. Other options like adjusting card fan speed, choosing a slot based on power supply proximity, or removing the top cover are not valid or safe practices for ensuring proper cooling.

Exam trap

The trap here is focusing on minor cable length or fan speed adjustments while overlooking the critical need for slot compatibility and proper air baffle placement.

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15
Multi-Selecthard

A technician is diagnosing a server that intermittently reboots under heavy load. The server has dual CPUs, 256GB of RAM, and four 1TB NVMe drives. The technician suspects a hardware issue. Which of the following should the technician check to confirm a power-related problem? (Choose two.)

Select 2 answers
A.Use a multimeter to measure the voltage at the wall outlet
B.Run a CPU stress test and monitor core temperatures
C.Review the IPMI event log for power supply failures or voltage warnings
D.Check the power supply rating and total system power draw to ensure adequate capacity
E.Reseat the memory modules and run a memory diagnostic
AnswersC, D

The IPMI event log records power supply status, voltage fluctuations, and thermal events. Intermittent reboots under load often correlate with power supply degradation or insufficient power delivery. Checking the log can reveal warnings such as a failed power supply or voltage out of range. This is a non-intrusive first step to confirm power issues before replacing hardware.

Why this answer

Power-related intermittent reboots under load are best diagnosed by reviewing the IPMI event log for power supply warnings and verifying that the power supply capacity meets the total system draw. These two checks directly address power delivery and capacity. Other options target thermal or memory issues, which are less likely given the load-correlated symptom.

Exam trap

The trap here is focusing on thermal or memory diagnostics when the symptom is specifically tied to heavy load, which points to power delivery.

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16
MCQmedium

A server administrator is installing a new PCIe network adapter into a rack server. The card is a full-height, full-length adapter, but the server chassis only accepts low-profile cards in its riser. Which of the following is the BEST course of action?

A.Install the card in the server's x16 slot without the riser to gain the needed height clearance.
B.Bend the card's mounting bracket so the adapter fits under the chassis lid.
C.Use a different riser that supports full-height cards, if the chassis offers one, or return the card for a low-profile equivalent.
D.Attach the card externally with a PCIe extension cable and leave the chassis lid open.
AnswerC

Match the card to the chassis: check whether the server offers an alternative riser that supports full-height or full-length cards, often an orderable option, or obtain a low-profile version of the same adapter, which many vendors offer. Also confirm the slot's PCIe generation and lane width, power requirements, and the server vendor's compatibility list, so the card is supported and cooled correctly.

Why this answer

Form factor compatibility is a prerequisite for card installation. A full-height, full-length adapter cannot be made to fit a low-profile riser through improvisation; the administrator must either use a chassis riser option that supports the larger form factor or obtain a low-profile equivalent adapter. This keeps mechanical retention, airflow, and support intact.

Exam trap

The trap here is trying to make a physically incompatible card fit, when the correct resolution is matching form factor through the proper riser or a different adapter.

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17
MCQhard

A technician is installing a new PCIe 4.0 x16 network adapter into a server that has a PCIe 3.0 x16 slot available. The server's BIOS is configured to auto-negotiate PCIe link speed. After installation, the adapter is detected but operates at reduced throughput. Which of the following is the MOST likely reason?

A.The BIOS needs to be updated to support PCIe 4.0.
B.The adapter is not compatible with the server's chipset.
C.The PCIe slot is electrically wired for x8 only.
D.The adapter is operating at PCIe 3.0 speeds due to slot limitations.
AnswerD

PCIe 4.0 adapters can run in PCIe 3.0 slots but will negotiate down to PCIe 3.0 speeds. This reduces maximum throughput. The adapter is detected and functional, but performance is limited by the older slot, which is the expected behavior.

Why this answer

The adapter operates at reduced throughput because it is installed in a PCIe 3.0 slot. PCIe is backward compatible, so a PCIe 4.0 adapter will negotiate down to the slot's maximum speed, which is PCIe 3.0. This limits bandwidth but does not prevent operation.

Exam trap

The trap here is assuming that a PCIe 4.0 adapter will always run at full speed regardless of the slot generation, ignoring backward compatibility limitations.

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18
Multi-Selectmedium

A technician is diagnosing a server that intermittently reboots under heavy load. The server is in a rack with proper airflow, and the operating system logs show no software errors. Which of the following should the technician check as part of the hardware diagnosis? (Choose two.)

Select 2 answers
A.Review the baseboard management controller event log for correctable and uncorrectable memory errors.
B.Rebuild the RAID array to clear any latent media errors on the data disks.
C.Verify that the server's power supplies provide adequate wattage for the installed CPUs, GPUs, and drives under peak load.
D.Confirm that the operating system's page file is sized to at least twice the installed physical RAM.
E.Update the antimalware definitions and run a full system scan to rule out a rootkit.
AnswersA, C

The BMC logs platform hardware events such as correctable and uncorrectable ECC errors that may not surface in the OS. Repeated correctable errors under load can indicate a failing DIMM and can precede an uncorrectable error that triggers a reboot. Checking this log is a core hardware diagnostic step.

Why this answer

Intermittent reboots under heavy load point to hardware causes such as memory errors or power delivery problems. The BMC event log can reveal ECC errors that the OS never sees, and a power budget check can expose an undersized or failing supply. Both are direct hardware diagnostics for load-dependent resets.

Page file sizing, malware scans, and RAID rebuilds do not explain this symptom.

Exam trap

The trap here is treating a load-dependent reboot as a software or storage problem instead of checking the BMC hardware log and power delivery capacity.

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19
MCQhard

A server administrator is installing a PCIe expansion card into a 2U server and notices the card requires supplemental power but the server's power supply lacks a spare PCIe power connector. The server's documentation lists a maximum slot power budget of 75W for the x16 slot. Which of the following is the MOST appropriate action?

A.Use a dual SATA-to-PCIe power adapter to feed the supplemental connector
B.Move the card to a x8 slot to reduce its power consumption
C.Verify the card's power requirement and confirm the PSU or riser can supply it before proceeding
D.Install the card and rely on the slot to supply all required power
AnswerC

This is correct because the card's stated power draw and the platform's available PCIe power cabling or riser capability determine whether the installation is viable. Confirming the real requirement against the PSU and riser specification prevents an underpowered card and identifies whether a higher-wattage PSU or a powered riser is needed before any hardware is committed.

Why this answer

Expansion cards with supplemental power connectors need more than the slot can deliver, so the technician must reconcile the card's actual power requirement with what the PSU and riser can provide. Confirming this before installation avoids underpowered operation, link instability, or damage. Relying on slot power, using unsafe adapters, or narrowing the lane width do not resolve the electrical shortfall.

Exam trap

The trap here is treating a supplemental power connector as optional and assuming the slot alone can drive any card that physically fits.

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20
MCQhard

An administrator installs a new PCIe NVMe solid-state drive into a server's x8 slot, but the operating system does not detect it. The slot is enabled in BIOS, the drive is on the compatibility list, and it is fully seated. The motherboard manual notes that the slot shares lanes with an onboard SAS controller that is currently enabled. Which of the following should the administrator do to resolve the issue?

A.Update the NVMe drive firmware so it enumerates in the shared slot.
B.Move the drive to a different x8 slot and leave the onboard SAS controller enabled.
C.Set the slot's bifurcation to x4x4 in BIOS to split the available lanes.
D.Disable the onboard SAS controller in BIOS or relocate the drive to a slot with dedicated lanes.
AnswerD

When a PCIe slot shares lanes with an onboard controller, enabling that controller can leave no lanes for the add-in card, so the slot appears empty. Disabling the onboard SAS controller in BIOS frees the shared lanes for the NVMe drive, and moving the card to a slot with dedicated lanes achieves the same result. Either action restores lane availability.

Why this answer

PCIe lane sharing means an add-in slot and an onboard controller cannot both use the same lanes simultaneously. With the onboard SAS controller enabled, the shared slot has no lanes to train the NVMe drive, so the OS never sees it. Disabling the onboard controller or moving the card to a slot with dedicated lanes restores the electrical link and allows detection.

Exam trap

The trap here is assuming any physically compatible PCIe slot always has usable lanes, when lane sharing with an enabled onboard controller can silently leave the slot electrically dead.

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21
MCQhard

A server has been experiencing random crashes and generating memory-related errors in the system event log. The technician has already run memory diagnostics which show frequent errors on a single DIMM. The server has four DIMMs installed. Which of the following is the BEST next step?

A.Update the BIOS firmware
B.Replace all four DIMMs to prevent future issues
C.Replace the failing DIMM with a known good, matching module
D.Reseat all DIMMs and re-run diagnostics
AnswerC

Diagnostics already identified a single faulty DIMM, so the fault is confirmed and isolated. Swapping that module for a known good, matching specification part restores stability without disturbing the other three DIMMs or risking mismatched memory timings.

Why this answer

The memory diagnostics already identified a single faulty DIMM, so the most direct and effective next step is to replace that specific module with a known good, matching one. This resolves the immediate hardware failure without unnecessary cost or downtime. Matching ensures compatibility and avoids introducing new issues.

Exam trap

SK0-005 often tests the misconception that any memory error requires replacing all DIMMs or updating firmware, rather than isolating and replacing the specific faulty module identified by diagnostics.

How to eliminate wrong answers

Option A is wrong because updating BIOS firmware is unlikely to fix a physically failing DIMM and is not the best next step after diagnostics confirm a hardware fault. Option B is wrong because replacing all four DIMMs is unnecessary and costly when only one is faulty; it does not address the root cause more effectively. Option D is wrong because reseating may temporarily fix contact issues but will not repair a defective DIMM that already shows frequent errors.

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22
MCQhard

A technician installs a new 2U server whose chassis is 24 inches deep into a rack with 30-inch posts. After mounting, the technician notices the server's rear fans are recirculating hot exhaust because the rack's rear door is perforated but the server's rear panel sits flush against it. Cable bundles also press against the door. Which of the following is the BEST action to correct the airflow problem?

A.Increase the speed of the server's rear fans through the management controller to overcome the back pressure.
B.Reinstall the server with a rail kit that positions the chassis so a gap remains between the rear panel and the door, and reroute cables to preserve that gap.
C.Replace the perforated rear door with a solid door to contain the exhaust.
D.Reverse the server's airflow direction so the fans draw air from the rear and exhaust to the front.
AnswerB

Rear clearance is required so exhaust can escape and intake air is not drawn from the hot aisle. If the chassis sits flush against a perforated door, exhaust recirculates and static pressure rises, reducing cooling efficiency. Selecting rails that leave a proper gap and managing cables so they do not block the rear plenum restores the intended front-to-back airflow path and keeps the door closable.

Why this answer

A server needs unobstructed space behind the rear panel so exhaust can leave the chassis and enter the hot aisle. When the chassis sits flush against a perforated door and cables fill the remaining space, exhaust recirculates into the intakes. Using rails that leave a proper gap and rerouting cables restores the front-to-back airflow path while keeping the cabinet closed.

Exam trap

The trap here is treating a perforated door as sufficient for cooling and compensating with fan speed, when the real issue is the missing rear clearance that lets exhaust recirculate.

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23
MCQhard

Several users report sluggish performance from a database server. The server administrator notices that the CPU fans are running at maximum speed and the baseboard management controller (BMC) reports CPU temperatures of 85°C even at idle. The administrator already cleaned dust from the chassis and verified all fans are operational. Which of the following should the administrator do NEXT?

A.Add additional case fans to improve airflow.
B.Replace the CPU fans with higher RPM models.
C.Reapply thermal paste on the CPU heat sinks.
D.Increase the fan speed thresholds in the BIOS.
AnswerC

High idle temperatures with working fans and a clean chassis indicate poor heat transfer between the CPU and its heat sink. Reapplying thermal paste restores that conductive interface, which is the next logical step before considering heat sink replacement or BIOS thermal configuration changes.

Why this answer

High CPU temperatures at idle despite clean fans and operational cooling indicate a degraded thermal interface between the CPU and heatsink. Reapplying thermal paste restores heat transfer efficiency, which should bring temperatures down. This is the next logical step after ruling out dust and fan failures.

Exam trap

SK0-005 often tests the troubleshooting sequence for overheating, causing candidates to jump to fan or airflow solutions before addressing the CPU thermal interface.

How to eliminate wrong answers

Option A is wrong because adding case fans improves overall airflow but does not address the CPU-to-heatsink thermal interface, which is the likely bottleneck. Option B is wrong because replacing CPU fans with higher RPM models does not fix a dried-out or poorly applied thermal paste. Option D is wrong because increasing fan speed thresholds in the BIOS only changes when fans ramp up; it does not reduce CPU temperature at idle and may mask the real issue.

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24
MCQmedium

A server administrator is installing a new 2U rack server that will use four 960GB SATA SSDs in a hardware RAID 10 array for the operating system. The server's RAID controller supports both SATA and SAS drives. After physically installing the drives in the front bays, the administrator powers on the server but the RAID controller does not detect any drives. Which of the following is the MOST likely cause?

A.The power supply units are insufficient to power the SSDs.
B.The RAID controller firmware needs to be updated to support SATA SSDs.
C.The drives are not initialized in the RAID controller BIOS.
D.The drives are not properly seated in the backplane connectors.
AnswerD

In a 2U server, drives slide into front bays and connect to a backplane. If not fully seated, the controller cannot detect them. Reseating the drives ensures proper contact with the backplane connectors, which is a common oversight during initial installation.

Why this answer

The most likely cause is that the drives are not fully seated in the backplane connectors. In hot-swap bays, drives must be pushed firmly until they click. If not seated, the RAID controller sees no drives.

Reseating is a simple first step before investigating firmware or configuration.

Exam trap

The trap here is assuming a firmware or configuration issue when the physical connection is the most common point of failure during initial installation.

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25
MCQeasy

A technician is installing a new server into a rack and needs to ensure the chassis does not tip forward when a heavy component is pulled out on its rails. Which of the following should the technician install FIRST?

A.A vertical PDU mounted in the rear of the rack to add weight to the back of the cabinet.
B.Cage nuts and screws at the front of the server to secure the chassis to the front uprights.
C.A cable management arm attached to the rear of the rails to limit forward travel.
D.A stabilizer or anti-tip foot on the bottom front of the rack before extending any equipment.
AnswerD

Rack stabilizers or anti-tip feet extend the effective footprint of the cabinet and prevent it from tipping when heavy servers are pulled forward on their rails. Installing them before extending equipment is a standard safety practice in server hardware installation and protects both personnel and hardware from a rack overturning.

Why this answer

Anti-tip feet or stabilizers widen the rack's base and prevent it from pitching forward when a server on sliding rails is fully extended. They should be deployed before equipment is pulled out, making them the correct first step to protect the technician and the installed hardware from an overturn.

Exam trap

The trap here is assuming front flange screws alone keep a rack from tipping when rails are extended.

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26
MCQmedium

A server technician is replacing a failed hot-swappable 2.5-inch SAS drive in a production 2U server while it remains powered on. The drive bay is populated and the array is in a degraded state. Which of the following should the technician do FIRST before physically removing the failed drive?

A.Verify the replacement drive has a higher spindle speed and larger cache than the failed unit
B.Shut down the server and place it in maintenance mode before opening the chassis
C.Delete the failed member from the RAID configuration to prevent rebuild conflicts
D.Identify the failed drive's bay location using the drive LED status indicators or the RAID controller management utility
AnswerD

This is correct because pulling the wrong drive from a live array can cause a second failure and take the volume offline entirely. The controller management utility or the bay fault LED unambiguously identifies which physical slot corresponds to the failed member, so the technician removes only the intended drive while the array remains degraded but accessible.

Why this answer

Before touching a live array, the technician must positively identify the failed member's physical bay. Fault LEDs on the drive carrier or the controller's management interface map logical members to physical slots, preventing removal of a healthy drive that would push a degraded array into a failed state. Shutting down, deleting configuration, or checking performance specs do not address the immediate risk of removing the wrong component.

Exam trap

The trap here is assuming any drive can be pulled because the hardware is hot-swappable, when the real hazard is removing a healthy member and destroying the array.

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27
MCQeasy

A server administrator is replacing a failed hard drive in a server that uses a hardware RAID controller. The server supports hot-swappable drives. Which of the following should the administrator do FIRST to safely replace the drive?

A.Remove the drive immediately and replace it with a new one.
B.Back up all data on the server before replacing the drive.
C.Power down the server and disconnect power cables.
D.Identify the failed drive using the RAID controller management utility or drive LEDs.
AnswerD

Before removing a drive, the administrator must positively identify the failed drive to avoid pulling a good drive and causing a second failure. RAID controllers provide management utilities (e.g., MegaRAID Storage Manager, iDRAC, or HPE Smart Storage Administrator) that show which physical drive is failed. Drive LEDs also indicate fault status. This step ensures the correct drive is replaced.

Why this answer

The correct first step is to identify the failed drive using the RAID controller management utility or drive LEDs. This prevents accidentally removing a healthy drive, which could cause a second failure and potentially data loss. Once the failed drive is confirmed, the administrator can safely hot-swap it.

Backups and power-down are not required first steps in a hot-swap scenario.

Exam trap

The trap here is thinking that hot-swap means you can just pull any drive without verification, or that you must power down first.

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28
MCQeasy

A rack-mounted server must be installed in a datacenter cabinet that is only 30 inches deep, while the server's rails require a minimum depth of 35 inches for the rear brackets to attach. The server is currently supported only by the front flanges. Which of the following should the technician do?

A.Mount the server in the shallow cabinet using a universal rail kit that does not require rear attachment.
B.Trim the rear rails to fit the 30-inch cabinet and torque the front flanges to compensate for the missing rear support.
C.Install the server using only the front mounting flanges and support the rear with a shelf.
D.Relocate the server to a cabinet that meets the rail's minimum depth requirement and mount it with both front and rear brackets secured.
AnswerD

Rails are engineered to bear the chassis weight at both the front and rear attachment points. A cabinet shallower than the rail's minimum depth cannot support the rear brackets, so moving the server to a compliant cabinet and securing both ends is the correct way to ensure stability, airflow alignment, and safe serviceability.

Why this answer

Server rails are designed to attach at both the front and rear of the cabinet, distributing the chassis weight and keeping the unit square. A cabinet that does not meet the rail's minimum depth cannot accept the rear brackets, so the correct action is to install the server in a cabinet that satisfies the rail specification rather than improvising support.

Exam trap

The trap here is treating the front flanges as sufficient structural support for a permanently racked server.

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29
PBQmedium

A server administrator receives reports that a production server is shutting down unexpectedly after running for several hours. The server is a 2U rackmount unit located in a data center with proper ambient cooling (20°C/68°F). The server has redundant power supplies connected to separate PDUs and no power anomalies are reported. The administrator checks the operating system event logs and finds a critical log entry: 'The system was shut down due to a thermal event.' However, the CPU temperature logs show that the CPU was at 47°C at the time of shutdown, and the chassis inlet temperature was 23°C. The server's internal fans are running at high speed and are clearly audible. The administrator suspects a thermal issue but is unsure why the CPU is not showing high temperature. The server has a baseboard management controller (BMC) that monitors various sensors. Which of the following components should the administrator investigate FIRST to identify the likely cause of the shutdown?

A.Swap the redundant power supplies to rule out a failing PSU.
B.Inspect the voltage regulator module (VRM) temperatures and airflow around the motherboard.
C.Replace the CPU heatsink and reapply thermal paste.
D.Update the server firmware and BIOS to the latest version.
AnswerB

Why this answer

Option B is correct because voltage regulator modules (VRMs) can overheat and trigger a thermal shutdown via the BMC even when the CPU temperature is within normal limits. VRMs are often located in areas with restricted airflow and are critical to CPU power delivery. Option A is incorrect because CPU temperature is normal, so the heatsink is likely functioning.

Option C is incorrect because power supply faults would not generate a thermal event. Option D is a possible long-term fix for a firmware bug, but physical inspection of temperature-sensitive components should come first.

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30
MCQeasy

A technician is installing a new server into a rack and needs to connect the server's out-of-band management port so the server can be powered on and monitored remotely. Which of the following should the technician connect?

A.The iDRAC or iLO dedicated management port to the management network.
B.The serial port to a terminal server.
C.The USB port to a KVM switch in the rack.
D.The onboard 1 GbE NIC to the production network switch.
AnswerA

The dedicated management port, branded iDRAC on Dell and iLO on HPE, provides out-of-band access independent of the operating system. It allows remote power control, console redirection, and hardware monitoring, which is exactly what the technician needs for remote power-on and monitoring.

Why this answer

Out-of-band management is provided by a dedicated service processor with its own network port, such as iDRAC or iLO. Connecting that port to the management network lets an administrator power cycle the server, view the console, and monitor hardware health even when the operating system is down.

Exam trap

The trap here is confusing in-band network connectivity with out-of-band management that works independently of the operating system.

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31
MCQeasy

A rack-mount server must be installed in a cabinet that is only 30 inches deep, while the server's rails are designed for a 36-inch cabinet and allow the chassis to extend beyond the front and rear posts. The server must remain serviceable and the cabinet doors must close. Which of the following should the technician do FIRST?

A.Verify the rail kit's minimum cabinet depth and obtain a shorter rail kit or a deeper cabinet if the specified depth is not met.
B.Install the server with the front posts only and let the rear of the chassis rest on the cabinet base.
C.Mount the server vertically using a wall-mount bracket instead of the rails.
D.Remove the cabinet's rear door to provide the extra clearance the server needs.
AnswerA

Rail kits specify a minimum and maximum cabinet depth, commonly expressed as the distance between front and rear mounting posts. If the cabinet's post-to-post distance is below the rail kit minimum, the rails cannot be secured at both ends and the chassis will protrude. Confirming the specification and sourcing a compatible rail kit or cabinet is the correct first step before any physical work.

Why this answer

Rack rails are rated for a specific range of cabinet depths, and installing them in a shallower cabinet leaves the chassis unsupported at the rear and protruding past the posts. Checking the rail kit's published depth range and procuring compatible hardware or a deeper cabinet resolves the incompatibility before any damage or unsafe mounting occurs.

Exam trap

The trap here is treating cabinet depth as a cosmetic clearance issue and improvising support, when rail kits have hard minimum and maximum depth specifications that must be matched.

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32
Multi-Selectmedium

A technician is preparing to install a new server into a rack in a small server room. Which of the following steps should be performed to help ensure proper airflow and thermal management? (Choose two.)

Select 2 answers
A.Leave one rack unit of empty space between the new server and adjacent servers to improve cooling.
B.Verify that the server's airflow direction matches the rack's existing front-to-back or back-to-front configuration.
C.Remove the server's top cover to increase passive airflow around internal components.
D.Position the server at the top of the rack so its heat rises away from other equipment.
E.Install blanking panels in any unused rack units to prevent hot air from recirculating to the front.
AnswersB, E

Mixing airflow directions in a shared rack causes hot exhaust from one server to be drawn into the intake of another, raising inlet temperatures and triggering thermal throttling or shutdown. Confirming that the new server's fan modules and bezel match the rack's established direction prevents recirculation and keeps all equipment within its thermal envelope.

Why this answer

Thermal management in a rack depends on maintaining a consistent airflow direction and preserving the separation between cold intake air and hot exhaust air. Matching the server's airflow to the rack's established direction prevents recirculation, and blanking panels close unused rack units so hot air cannot escape to the front and be drawn back into equipment intakes.

Exam trap

The trap here is assuming open space or an open chassis improves cooling, when both actually break the pressure boundary and allow hot-air recirculation.

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33
MCQmedium

Refer to the exhibit. During boot, the server displays this error and shuts down. Which of the following is the most likely cause?

A.The CPU heatsink is not properly installed.
B.The CPU fan is not connected to the CPU_FAN header.
C.The BIOS fan profile is set to 'Silent' mode.
D.The CPU has failed.
AnswerB

The error message 'No fan detected' strongly indicates a physical disconnection. The system halts to prevent thermal damage.

Why this answer

The error shown in the exhibit is a 'CPU Fan Error' or 'CPU Fan Speed Error' that occurs during POST. This specific error is triggered when the motherboard does not detect a tachometer (RPM) signal on the CPU_FAN header. The most common cause is that the CPU fan is not connected to the CPU_FAN header, either because it is plugged into a different header (e.g., SYS_FAN) or not plugged in at all.

Since the fan is not connected to the correct header, the motherboard cannot read its speed and halts the boot to prevent overheating.

Exam trap

SK0-005 often tests the specific POST error messages and their causes; candidates may confuse a CPU fan error with a heatsink installation issue or a failed CPU, but the key is that the error explicitly indicates a fan detection problem, not a thermal or CPU failure.

How to eliminate wrong answers

Option A is wrong because a poorly installed heatsink would typically cause high CPU temperatures and thermal shutdowns, not an immediate fan error at boot; the fan might still spin and report RPM. Option C is wrong because a 'Silent' fan profile would only lower fan speeds, not eliminate the tachometer signal entirely; the motherboard would still detect some RPM, though it might warn if below a threshold, but the error would not be as definitive as 'CPU Fan Error'. Option D is wrong because a failed CPU would usually result in no POST at all, not a specific fan error; the motherboard would not be able to report a fan issue if the CPU were dead.

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34
MCQeasy

A server administrator is replacing a failed hard drive in a RAID 5 array on a production server. The server supports hot-swap drives. Which of the following should the administrator do FIRST to replace the drive?

A.Reconfigure the RAID array to RAID 6 before replacing the drive.
B.Power down the server before replacing the drive.
C.Remove the failed drive and insert the replacement drive.
D.Back up all data on the server before replacing the drive.
AnswerC

In a hot-swap capable server, the failed drive can be removed and replaced without powering down the system. The RAID controller will automatically rebuild the array onto the new drive. This is the correct first step because hot-swap support allows safe removal and insertion while the server is running.

Why this answer

With hot-swap support, the failed drive can be removed and replaced while the server remains online. The RAID controller will detect the new drive and begin rebuilding the array. Powering down, reconfiguring RAID, or performing a full backup first are unnecessary and would introduce downtime or delay.

The correct first action is to physically replace the drive.

Exam trap

The trap here is overcomplicating the process by thinking a backup or power-down is required, but hot-swap drives are designed for immediate replacement.

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35
Multi-Selectmedium

A technician is preparing to install a new 2U rack server into a cabinet that already hosts several running servers. The technician must ensure proper airflow and physical security. Which of the following actions should the technician take? (Choose two.)

Select 2 answers
A.Secure the server to the rails and cabinet using the front thumbscrews or captive fasteners
B.Align the server's front intake with the cold aisle and rear exhaust with the hot aisle
C.Install the server so its rear exhaust faces the cold aisle to shorten the cable runs
D.Fill every empty rack unit with a blanking panel to increase overall airflow volume
E.Leave the front bezel off to maximize unrestricted intake airflow
AnswersA, B

This is correct because fastening the chassis to the rails and cabinet prevents it from sliding forward during cable pulls or service, which could dislodge power and network connections on adjacent units. Captive thumbscrews or front fasteners also deter casual removal and satisfy physical security expectations in shared or colocation cabinets.

Why this answer

Rack servers must face the cold aisle so intake air stays cool, and they must be fastened to the rails to prevent movement that could disturb adjacent cabling. These two actions address airflow integrity and physical security respectively. Reversing orientation breaks thermal containment, while removing the bezel or mischaracterizing blanking panels does not satisfy the stated requirements.

Exam trap

The trap here is confusing blanking panels' role in preventing hot-air recirculation with an imagined benefit of increasing airflow volume.

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36
MCQmedium

A technician is installing a new 2U rack server in a data center. The server documentation specifies that the rail kit must be mounted in a rack with square-hole mounting holes, but the existing rack cabinet uses round threaded holes. The technician needs the server to slide in and out of the rack for maintenance while remaining securely supported. Which of the following should the technician do?

A.Drill new square holes in the rack posts so the supplied rails fit
B.Obtain a rail kit or adapter designed for round threaded-hole racks and install the server with it
C.Install the rails using the included cage nuts and screws in the round holes
D.Place the server on fixed shelf rails and skip the sliding rail installation
AnswerB

Round threaded-hole racks require rail kits with adapter brackets or a dedicated round-hole rail kit, because the mounting geometry and hole pitch differ from square-hole racks. Using the correct adapter preserves the sliding rail function and load rating. This is the only option that keeps the server both securely mounted and serviceable by sliding, which the scenario explicitly requires.

Why this answer

Round threaded-hole racks and square-hole racks use different mounting hardware and hole geometry, so a rail kit built for square holes will not seat correctly in a threaded-hole rack. The proper resolution is to use a rail kit or adapter bracket specifically designed for round threaded-hole racks, which maintains the sliding function and rated load capacity the technician needs for routine maintenance access.

Exam trap

The trap here is assuming any rail kit will bolt into any rack, when the mounting-hole style dictates which rail kit or adapter is required.

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37
MCQmedium

A server administrator is installing a new 2U rack server into a datacenter rack. The server has two hot-swap 1100W power supplies. The rack currently has a 30A/208V single-phase PDU that is only 40% loaded. The administrator connects both power supplies to the same PDU. After a few months, one power supply fails, but the server remains operational. Which of the following should the administrator do to improve power redundancy?

A.Install a redundant PDU in the same rack and connect both power supplies to it.
B.Enable power capping on the server to reduce the load on the PDU.
C.Connect one power supply to a different PDU on a separate power feed.
D.Replace the 1100W power supplies with higher-wattage units.
AnswerC

Connecting each power supply to a separate PDU fed by a different power source provides true redundancy. If one PDU or its upstream feed fails, the other supply continues to power the server. This is a best practice for mission-critical servers and addresses the single point of failure that caused the initial concern.

Why this answer

The server currently has both power supplies connected to the same PDU, creating a single point of failure. To achieve true power redundancy, each power supply must be connected to a separate power source, ideally on different circuits or feeds. This ensures that if one PDU or feed fails, the server continues to operate on the remaining supply.

Exam trap

The trap here is assuming that simply having two power supplies ensures redundancy, when connecting them to the same PDU leaves a single point of failure.

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38
MCQhard

A technician is installing a new server with a hardware RAID controller. The server will host a database that requires high write performance and redundancy. The technician configures four SSDs in a RAID 10 array. After installation, the operating system reports the array as 1.2TB, but the technician expected 2.4TB. Which of the following explains the discrepancy?

A.The operating system is using a 512-byte sector size instead of 4K, reducing usable capacity.
B.RAID 10 uses mirroring and striping, so only half of the raw capacity is available for data.
C.The RAID controller is configured for RAID 5, which uses one drive for parity.
D.The SSDs are not compatible with the RAID controller, causing a size mismatch.
AnswerB

RAID 10 combines mirroring and striping. With four drives, data is mirrored across pairs, so the usable capacity is half of the total raw capacity. If each drive is 600GB, the raw capacity is 2.4TB, and the usable capacity is 1.2TB. This matches the reported size and is expected behavior for RAID 10.

Why this answer

RAID 10 requires a minimum of four drives and provides both striping and mirroring. The usable capacity is always 50% of the total raw capacity because each block is written to two drives. In this scenario, four 600GB drives yield 2.4TB raw and 1.2TB usable.

The technician's expectation of 2.4TB would only be correct for RAID 0 or a non-redundant configuration.

Exam trap

The trap here is confusing RAID 10 with RAID 5 or RAID 6, where usable capacity is a higher percentage of raw capacity.

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39
Multi-Selectmedium

A technician is preparing to replace a failed hot-swap SAS drive in a production server. The server has a RAID 1 array for the operating system and a RAID 5 array for data. The failed drive belongs to the RAID 5 array. Which of the following steps should the technician take before physically removing the drive? (Choose two.)

Select 2 answers
A.Back up all data on the RAID 5 array to external media.
B.Verify the drive's slot location using the storage management utility or drive bay LED.
C.Confirm the array is in a degraded but functional state and not rebuilding.
D.Update the RAID controller firmware before removing the drive.
E.Power down the server to prevent electrical damage to the backplane.
AnswersB, C

Confirming the exact slot of the failed drive prevents removing a healthy member of the RAID 5 array. Storage management utilities and bay fault LEDs identify the degraded member. Removing the wrong drive from a RAID 5 set could cause a second failure and data loss if the array is already degraded, so verifying the slot is a required step before physical removal.

Why this answer

Before pulling a failed drive from a RAID 5 array, the technician must confirm the correct slot and verify the array's current state. These steps prevent removing a healthy drive and ensure the array can tolerate the replacement. Backups, power-down, and firmware updates are not required immediate pre-removal actions for a hot-swap replacement.

Exam trap

The trap here is treating a hot-swap replacement as a major maintenance event that requires a shutdown or firmware update, when the real risks are pulling the wrong drive and misreading the array state.

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40
MCQeasy

A server administrator is installing a new 1U server into a rack that already contains several servers. The rack has a limited number of power outlets, and the administrator needs to connect the server's two redundant power supplies. Which of the following should the administrator do to ensure power redundancy?

A.Connect both power supplies to the same PDU using two outlets
B.Connect one power supply to a PDU and leave the other unplugged as a spare
C.Connect each power supply to a different PDU on separate circuits
D.Connect both power supplies to the same circuit but different PDUs
AnswerC

Connecting each power supply to a separate PDU fed by different circuits ensures that a single PDU or circuit failure does not take down the server. This is a standard practice for redundancy. It protects against power strip failure, breaker trips, or circuit overload. The server continues running on the remaining power supply until power is restored.

Why this answer

For true power redundancy, each power supply should connect to a separate PDU on a different circuit. This isolates the server from a single PDU or circuit failure. Connecting both to the same PDU or circuit leaves a single point of failure, while leaving one unplugged provides no active redundancy.

Separate circuits are the accepted best practice.

Exam trap

The trap here is thinking that two outlets on the same PDU provide redundancy, when they share the same power source.

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41
MCQhard

A data center team is deploying a new 4U storage server that will hold 24 nearline SAS drives. The server will sit in a rack alongside network switches, and the team wants to minimize vibration-related drive errors. Which of the following installation practices BEST addresses this concern?

A.Use a rack with a higher static load rating so the added drive weight does not flex the frame.
B.Install the server on sliding rails with rubber isolation washers and ensure the rack is anchored and stabilized.
C.Mount the server at the top of the rack to keep it away from floor-level vibration.
D.Fill all empty rack U space with blanking panels to improve front-to-back airflow.
AnswerB

Rotational vibration from adjacent drives and fans degrades nearline drive performance and can shorten life. Isolation washers and properly anchored, stabilized racks damp that energy before it reaches the chassis. This combination directly targets vibration transfer and rack movement, which is exactly the concern for a densely populated storage server in a mixed rack.

Why this answer

High-density nearline drives are sensitive to rotational and translational vibration, which adjacent drives, fans, and rack movement generate. Isolating the chassis with rubber-mounted rails and anchoring the rack reduces the energy reaching the drives and prevents the frame from swaying. Airflow and load rating are valid considerations but do not address vibration coupling.

Exam trap

The trap here is confusing airflow management or rack weight capacity with vibration isolation, which are separate mechanical concerns.

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42
MCQhard

A technician is installing a new server that will host a virtualized environment. The server has 512GB of RAM installed as 16 x 32GB DIMMs. The technician notices that the server reports only 256GB of RAM during POST. Which of the following is the MOST likely cause?

A.One of the memory channels has failed, disabling half the DIMMs
B.The DIMMs are not all the same speed, so the server downclocked and disabled half
C.The server's memory controller only supports up to 256GB
D.The DIMMs are installed in the wrong slots, causing half of them to be disabled
AnswerD

Many servers require DIMMs to be populated in specific slot order to enable all memory channels. If DIMMs are installed in slots that are not recognized without a corresponding slot being filled, the server may disable half the memory. This is a common issue when populating all slots without following the population rules. The result is exactly half the installed memory being reported.

Why this answer

The most likely cause is incorrect DIMM slot population. Servers require DIMMs to be installed in a specific order to enable all channels. If half the DIMMs are in slots that are not activated without a corresponding slot being filled, the server will report only half the installed memory.

Other options would typically produce errors or not match the exact half-memory symptom.

Exam trap

The trap here is assuming a hardware failure or limit, when the symptom of exactly half the memory often points to a population rule violation.

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43
MCQhard

A technician is replacing a failed hard drive in a hot-swap RAID 5 array. After inserting the new drive, the RAID controller does not automatically rebuild. What should the technician do first?

A.Check the SAS cable connection
B.Reboot the server
C.Replace the drive with a different model
D.Manually initiate a rebuild from the RAID controller utility
AnswerD

Hot-swap insertion alone does not guarantee the controller detects and rebuilds the array; many controllers require an explicit rebuild command. Initiating the rebuild manually from the RAID controller utility restores redundancy using parity data, satisfying the requirement to recover the degraded RAID 5 array.

Why this answer

In a hot-swap RAID 5 array, the controller detects the new drive but may not begin rebuilding automatically depending on its configuration — some controllers require an explicit rebuild command. The technician's first action should be to open the RAID controller utility (e.g., MegaRAID Storage Manager, Dell OpenManage, or HPE Smart Storage Administrator) and manually initiate the rebuild. This is the least invasive step and directly addresses the missing rebuild.

Exam trap

SK0-005 often tests the assumption that hot-swap drives always trigger automatic rebuilds — candidates overlook that controller configuration or foreign-configuration states may require a manual rebuild command before any hardware troubleshooting is warranted.

How to eliminate wrong answers

Option A is wrong because if the SAS cable were disconnected, the controller would not detect the new drive at all — the scenario states the drive was inserted and detected, just not rebuilt. Option B is wrong because rebooting the server is disruptive and unnecessary; it may or may not trigger an automatic rebuild and risks downtime for a production array. Option C is wrong because replacing the drive with a different model is premature — the current drive is functional and detected; the issue is a configuration/command gap, not hardware incompatibility.

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44
MCQhard

A server administrator is installing a new 1U server into a rack. The server's rail kit includes both inner and outer rails. The administrator notices that the inner rails need to be attached to the server chassis before mounting. Which of the following is the correct procedure to install the server into the rack?

A.Attach the inner rails to the server chassis, then slide the server into the outer rails already mounted in the rack.
B.Attach both inner and outer rails to the server chassis, then lift the entire assembly into the rack.
C.Attach the outer rails to the server chassis, then slide the server into the inner rails mounted in the rack.
D.Mount the server directly onto the rack posts without using the rail kit.
AnswerA

This is the standard procedure for rail kits with inner and outer rails. The inner rails attach to the server, and the outer rails mount to the rack. Then the server with inner rails slides into the outer rails and locks into place. This ensures proper alignment and secure mounting.

Why this answer

The correct procedure is to attach the inner rails to the server chassis and the outer rails to the rack, then slide the server into the rack. This is the standard method for rail kits with separate inner and outer components. Other options reverse the components or omit rails entirely, which would result in improper or unsafe installation.

Exam trap

The trap here is confusing which rail component attaches to the server versus the rack, leading to an inverted installation that will not work.

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45
MCQeasy

A technician is installing a new 2U server into a datacenter rack. The server is equipped with redundant power supplies. According to best practices for power redundancy, how should the technician connect the power supplies?

A.Connect one PSU to a UPS and the other directly to mains
B.Run one PSU at 110V and the other at 220V for load balancing
C.Connect each PSU to a separate circuit
D.Connect both PSUs to the same power distribution unit (PDU)
AnswerC

Best practice is to connect redundant PSUs to independent power sources (separate PDUs on different circuit breakers) to eliminate single points of failure.

Why this answer

Option B is correct because connecting each power supply to a separate circuit (or separate PDUs fed by different circuits) ensures that if one circuit fails, the other keeps the server powered. Option A is wrong because connecting both to the same PDU creates a single point of failure. Option C is wrong because while a UPS is important, connecting only one PSU to a UPS defeats redundancy if the non-UPS circuit fails.

Option D is wrong because operating voltages are standardized and must match the server specifications.

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46
MCQeasy

A technician needs to add four new 2.5-inch SSDs to a rack server that currently has all eight 2.5-inch front drive bays populated with SAS hard drives. The server's backplane supports hot-swap and the RAID controller supports online capacity expansion. Which of the following is the BEST way to add the SSDs?

A.Replace four existing SAS hard drives with the SSDs and rebuild the array, accepting the loss of the hard drive capacity.
B.Install an additional hot-swap drive cage or expander backplane connected to the existing RAID controller, then add the SSDs and expand the array.
C.Connect the four SSDs to the motherboard's onboard SATA ports and create a separate operating system RAID volume.
D.Attach the SSDs as external USB 3.0 drives and present them to the RAID controller as pass-through disks.
AnswerB

When all front bays are occupied, the supported method is to add more bays through an approved drive cage or expander backplane attached to the RAID controller. This maintains hot-swap capability and lets the controller incorporate the new disks into a logical drive using online capacity expansion. It follows vendor-supported cabling and thermal design.

Why this answer

All front bays are full, so the technician must extend the drive subsystem using a supported additional cage or expander backplane tied to the RAID controller. That preserves hot-swap serviceability and allows online capacity expansion to include the new SSDs. Replacing drives, using onboard SATA, or attaching USB disks does not meet the requirement of adding four SSDs to the existing protected storage.

Exam trap

The trap here is choosing a workaround like USB or onboard SATA instead of using the vendor-supported drive cage or expander path for additional hot-swap bays.

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47
MCQeasy

A technician is tasked with installing a new PCIe expansion card into a rack-mounted server. The server will be powered off but remains in the rack. Which of the following should the technician do FIRST to prevent electrostatic discharge (ESD) damage?

A.Wear an antistatic wrist strap connected to the server chassis.
B.Touch the metal frame of the rack to discharge static electricity.
C.Place the expansion card on a non-conductive surface.
D.Power on the server to warm up the components and reduce static.
AnswerA

Wearing an antistatic wrist strap connected to the server chassis equalizes the electrical potential between the technician and the server, preventing ESD. This is the first and most important step before handling internal components. The server should be powered off and unplugged, but the wrist strap should be connected to the chassis to ensure a common ground. This is a standard ESD prevention practice.

Why this answer

The first step to prevent ESD is to wear an antistatic wrist strap connected to the server chassis. This ensures the technician and the server are at the same electrical potential, preventing static discharge that could damage sensitive components. Other methods like touching the rack are temporary and less effective.

Always follow proper ESD procedures before handling internal hardware.

Exam trap

The trap here is thinking that simply touching a metal object discharges static sufficiently, but continuous grounding through a wrist strap is required for safe handling.

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48
MCQhard

A server administrator is installing a new SAS SSD into a server that supports hot-swap drives. The server has a hardware RAID controller and the drive bay is accessible from the front. The administrator wants to add the drive to an existing RAID 5 array without bringing the server down. Which of the following should the administrator do?

A.Insert the drive and use the operating system's disk management to extend the volume onto the new disk.
B.Insert the drive and use the RAID controller's online capacity expansion feature to add it to the array.
C.Insert the drive and configure it as a global hot spare for the existing array.
D.Insert the drive and create a new RAID 0 array with it, then span the volumes.
AnswerB

Online capacity expansion allows adding a drive to an existing RAID array while the system remains operational. The administrator should insert the hot-swap drive, then use the RAID controller management utility to expand the array. This process may take time and can impact performance, but it avoids downtime. This is the correct method for adding capacity without shutting down the server.

Why this answer

To add a drive to an existing RAID 5 array without downtime, the administrator should use the RAID controller's online capacity expansion feature. This allows the array to be reconfigured to include the new drive while the system remains online. The process typically involves inserting the hot-swap drive, then using the controller's management software to expand the array.

Performance may degrade during the rebuild, but it avoids service interruption.

Exam trap

The trap here is confusing a hot spare with capacity expansion; a hot spare only provides redundancy and does not increase usable storage.

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49
MCQmedium

A server administrator is configuring a new server with four 1TB NVMe drives. The server will host a database that requires high random read/write performance and redundancy. Which of the following RAID levels should the administrator choose?

A.RAID 10
B.RAID 6
C.RAID 5
D.RAID 0
AnswerA

RAID 10 combines mirroring and striping, providing both redundancy and high performance. It can tolerate one drive failure per mirrored pair (up to two drives in a four-drive array, depending on which drives fail). For databases with high random read/write, RAID 10 is often the best choice. It offers excellent write performance because there is no parity calculation. The trade-off is 50% usable capacity, but performance and redundancy are prioritized.

Why this answer

RAID 10 is the best choice because it provides both redundancy and high performance for random read/write workloads. It mirrors data across pairs of drives and stripes across the pairs, eliminating parity overhead. RAID 0 lacks redundancy, RAID 5 has write performance penalties, and RAID 6 has even slower writes.

The database's need for high random I/O and fault tolerance makes RAID 10 ideal.

Exam trap

The trap here is choosing RAID 5 for its balance of capacity and redundancy, but overlooking its write performance penalty for databases.

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50
Multi-Selectmedium

A technician is preparing to install a replacement hot-swap SAS drive into a production server's front drive bay. The array is currently healthy and the new drive will be used as a global hot spare. Which of the following steps are required to complete the installation safely? (Choose two.)

Select 2 answers
A.Format the replacement drive with the operating system's native file system before insertion.
B.Power down the entire server and disconnect both power supplies before opening the drive bay.
C.Attach an ESD wrist strap to the chassis and the technician before handling the drive.
D.Confirm the replacement drive matches the existing drives in interface, rotational speed, and capacity so the array can use it.
E.Delete the existing logical drive configuration so the controller can detect the new physical disk.
AnswersC, D

Electrostatic discharge can damage drive electronics even if the failure is not immediate, and field replacements are a common source of latent ESD damage. Bonding the technician to the server chassis with a wrist strap equalizes potential before the drive is touched. Because the drive is being handled during a live service operation, this protective step is required as part of the installation procedure.

Why this answer

Adding a hot spare requires a compatible drive, verified against the array's interface, speed, and capacity, and ESD protection during handling because the electronics are vulnerable even when the server stays online. The hot-swap bay and healthy array mean no power-down or configuration deletion is needed, and the controller handles block-level rebuilds without any file system preparation.

Exam trap

The trap here is overreacting to a live drive insertion by powering down the server or clearing the array, when hot-swap hardware and controller-managed rebuilds are specifically designed to avoid those destructive steps.

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51
MCQmedium

A technician installs additional RAM in a server. After powering on, the server emits a continuous beep code and does not POST. The server documentation indicates this beep code signifies a memory error. Which of the following is the MOST likely cause?

A.The total RAM exceeds the server's maximum supported capacity.
B.The new RAM is not fully seated in the memory slot.
C.The new RAM is ECC and the existing RAM is non-ECC.
D.The server BIOS needs to be updated to support the new RAM type.
AnswerB

A memory error beep with no POST most commonly results from a module not fully latched into its slot, breaking contact with the DIMM socket. Reseating the new RAM until the retention clips click restores proper electrical connection.

Why this answer

A continuous beep code indicating a memory error immediately after installing additional RAM most commonly means the new module is not fully seated in its slot. If the DIMM is not clicked into place, the server cannot detect it properly and halts POST with a memory error beep code. Reseating the module typically resolves the issue.

Exam trap

SK0-005 often tests the most likely physical cause of a post-installation hardware error — candidates overthink and pick capacity, ECC mismatch, or BIOS compatibility when the simplest and most common cause is improper seating.

How to eliminate wrong answers

Option A is wrong because exceeding maximum supported capacity usually results in the server ignoring the excess RAM or posting a capacity warning, not a continuous memory-error beep code immediately after installation. Option C is wrong because mixing ECC and non-ECC RAM is generally not supported and would typically cause the system to fail to recognize the module or post a compatibility error, but the most common cause of a fresh memory error after installation is improper seating. Option D is wrong because a BIOS update is only needed if the RAM type is unrecognized by the current firmware — a less likely cause than a physically unseated module, and it would not produce an immediate continuous beep on first boot after installation.

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52
MCQhard

A server administrator is configuring a RAID array for a database server that requires high fault tolerance and performance. The server has eight 2.5-inch SAS drives and a hardware RAID controller with 1GB cache and battery backup. The administrator needs to maximize usable capacity while tolerating the failure of up to two drives. Which RAID level should be used?

A.RAID 10
B.RAID 5
C.RAID 6
D.RAID 0
AnswerC

RAID 6 uses double parity, allowing it to survive two simultaneous drive failures. It provides a good balance of fault tolerance and usable capacity, though write performance is lower than RAID 10. For a database server, RAID 6 with a battery-backed cache can mitigate write penalties, making it suitable when capacity is prioritized.

Why this answer

RAID 6 is the correct choice because it can tolerate two simultaneous drive failures while providing usable capacity of N-2 drives. With eight drives, that yields six drives' worth of capacity. Although write performance is lower than RAID 10, the battery-backed cache helps, and the requirement prioritizes fault tolerance and capacity over maximum write speed.

Exam trap

The trap here is assuming RAID 10 always tolerates two drive failures, but it only does so if the failures are in different mirrored pairs.

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53
Multi-Selecthard

A server administrator needs to set up out-of-band management for a new server. Which THREE of the following are essential for successful configuration and remote access? (Choose three.)

Select 3 answers
A.A DHCP server configured to provide an IP to the management interface.
B.A dedicated management network interface (e.g., iDRAC, iLO dedicated port).
C.A Baseboard Management Controller (BMC) with proper firmware.
D.An installed operating system on the server.
E.A web browser or SSH client to access the management console.
AnswersB, C, E

A dedicated management interface such as iDRAC or iLO keeps out-of-band traffic physically separate from production data. This isolation lets administrators reach the console even when the host OS or production NICs fail, satisfying the remote-access requirement.

Why this answer

Option B is correct because out-of-band management requires a dedicated management interface such as an iDRAC or iLO dedicated port, which remains accessible independently of the host operating system and provides remote KVM, power control, and console redirection. Option C is correct because the Baseboard Management Controller (BMC) is the hardware component that implements out-of-band management, and it must have proper firmware to support remote access features such as IPMI, Redfish, or vendor-specific web interfaces. Option E is correct because remote administrators need a web browser or SSH client to reach the management console, since BMCs typically expose a web GUI over HTTPS and may also support SSH or serial-over-LAN access.

Option A is not essential because the management interface can be configured with a static IP address, so a DHCP server is not required for successful out-of-band access. Option D is not essential because out-of-band management is designed to work independently of the installed operating system, allowing access even when the OS is down or not yet installed.

Exam trap

SK0-005 often tests whether candidates conflate in-band (OS-dependent) with out-of-band (OS-independent) management — the trap is selecting 'installed OS' or 'DHCP' as essential when static IPs and OS-less operation are the norm.

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54
MCQeasy

A server technician replaces a failed RAM module with an identical spare. After installation, the server powers on but emits continuous short beeps and does not complete POST. Which of the following is the MOST likely cause?

A.The new RAM module is incompatible with the motherboard.
B.The RAM module is not fully seated in the slot.
C.The CPU has been damaged during the installation.
D.The power supply is providing insufficient voltage.
AnswerB

Continuous short beeps are a classic symptom of a memory issue, and reseating the module is the first troubleshooting step. Even identical modules can be improperly installed.

Why this answer

Continuous short beeps typically indicate a memory error, and the most common cause after a RAM replacement is that the module is not fully seated. Even though the module is known good and compatible, improper installation can prevent POST. Option C is correct because reseating the module will often resolve the issue.

Option A is incorrect because an incompatible module would likely produce a different beep code or no POST at all, but the module is identical and known good. Option B is incorrect because insufficient power would likely prevent the server from powering on at all, not cause RAM beep codes. Option D is incorrect because CPU damage is unlikely from a simple RAM swap and would produce different symptoms.

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55
MCQeasy

A technician must replace a failed 2.5-inch hot-swap SAS drive in a running production server. The array supports hot swapping and the replacement drive is on site. Which of the following is the FIRST step the technician should take?

A.Remove the failed drive immediately and insert the replacement to begin rebuilding.
B.Shut down the operating system and power off the server before opening the drive bay.
C.Update the RAID controller firmware so the replacement drive is recognized.
D.Identify the failed drive's bay location using the management interface or drive LEDs.
AnswerD

Before pulling any drive, the technician must confirm which physical bay holds the failed member, using the storage management utility or the drive's fault LED. Removing the wrong drive from a healthy array can cause data loss or a second degradation. Accurate identification is the essential first action, after which the hot swap can proceed safely.

Why this answer

Hot swapping still requires positive identification of the failed member before any hardware is touched. The management utility or the fault LED on the carrier confirms the correct bay, preventing removal of a healthy drive. Once identified, the failed drive can be pulled and the replacement inserted while the system remains online and rebuilds.

Exam trap

The trap here is equating hot swap with safe to pull any drive without first confirming the failed member's location.

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56
MCQeasy

A server technician is mounting a 4U server in a standard 19-inch rack. Which of the following safety precautions is MOST important before lifting the server into place?

A.Ensure the server's power supply voltage matches the rack's PDU.
B.Install cable management arms before mounting.
C.Confirm that the rack's weight capacity can support the server.
D.Verify that the rack is properly grounded.
AnswerC

A 4U server is heavy, so verifying the rack's rated load capacity prevents the rails or frame from failing and the unit falling. This addresses the lifting hazard the stem names, ahead of ESD or cable-management concerns.

Why this answer

Before lifting any server into a rack, the technician must verify the rack's weight capacity can support the server's weight, especially for a heavy 4U unit. Exceeding the rack's load rating can cause the rack to tip, collapse, or fail, creating a serious safety hazard for personnel and equipment. This is the primary safety check that must be performed before any physical lifting begins.

Exam trap

The trap here is confusing electrical safety precautions (voltage, grounding) with physical safety precautions (weight capacity), causing candidates to select a technically valid but contextually wrong answer for the pre-lift phase.

How to eliminate wrong answers

Option A is wrong because power supply voltage matching is an electrical compatibility concern addressed during cabling, not a safety precaution before lifting. Option B is wrong because installing cable management arms is a post-mounting convenience step and has no bearing on lifting safety. Option D is wrong because grounding is an electrical safety measure relevant when connecting power, not a prerequisite for the physical act of lifting the server.

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57
MCQmedium

A server administrator is upgrading the RAM on a server that supports quad-channel memory architecture. They install four identical 16GB DDR4 ECC modules, but the server only recognizes the memory as operating in single-channel mode. Which of the following is the most likely cause?

A.The DIMMs are not installed in the correct slots
B.One of the DIMMs is faulty
C.The DIMMs do not support ECC
D.The DIMMs are not registered (RDIMM)
AnswerA

Quad-channel operation requires the four DIMMs to populate specific slots, typically one per channel. Installing them in the wrong slots leaves channels unpopulated, so the memory controller falls back to single-channel mode despite identical modules.

Why this answer

Quad-channel memory requires the DIMMs to be installed in specific slots that are mapped to different memory channels. If the modules are placed in slots belonging to the same channel (e.g., all in channel A), the system will operate in single-channel mode. The correct slot population order is typically printed on the motherboard or in the server manual, often using color-coded slots to indicate channel grouping.

Therefore, incorrect slot placement is the most likely cause of the single-channel operation.

Exam trap

SK0-005 often tests the misconception that any four identical DIMMs will automatically enable quad-channel mode, ignoring the critical requirement for proper slot population as defined by the motherboard layout.

How to eliminate wrong answers

Option B is wrong because a faulty DIMM would typically cause the system to fail POST, report a memory error, or reduce capacity, not force single-channel mode; the system would still attempt to use remaining modules in their respective channels. Option C is wrong because ECC support is independent of channel architecture; non-ECC DIMMs would not prevent multi-channel operation, though they might not be supported by the server at all. Option D is wrong because registered (RDIMM) vs. unbuffered (UDIMM) is a separate compatibility issue; using the wrong type would usually prevent booting or cause errors, not degrade to single-channel mode.

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58
MCQhard

A technician is troubleshooting a server that intermittently reports correctable memory errors on a specific DIMM slot in the management controller log. The server has not crashed, and the operating system is stable. The technician reseats the DIMM and cleans the slot, but the errors continue. Which of the following should the technician do next?

A.Disable memory error correction in the BIOS to stop the log entries.
B.Update the server BIOS to the latest version and monitor for 30 days.
C.Replace the DIMM in the affected slot with a known-good module of the same specifications.
D.Move the DIMM to a different slot and leave it there permanently.
AnswerC

Correctable errors that persist after reseating and cleaning point to a failing DIMM or slot. Swapping in a known-good module of the same specifications isolates whether the fault follows the DIMM or stays with the slot. This is the logical next step before replacing the motherboard or making configuration changes, and it directly addresses the likely failing component.

Why this answer

Persistent correctable memory errors after reseating and cleaning indicate a failing DIMM or slot. Replacing the module with a known-good one of the same specifications isolates the fault. Disabling ECC, merely moving the DIMM, or waiting on a BIOS update does not repair the failing hardware and leaves the server at risk of an uncorrectable error.

Exam trap

The trap here is treating correctable memory errors as harmless log noise and choosing a configuration change instead of replacing the suspect hardware.

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59
MCQeasy

A technician needs to replace a failed hot-swap SAS drive in a running server. The array is configured as RAID 6 with a dedicated hot spare. Which of the following describes the correct procedure?

A.Move the hot spare into the failed drive's bay and leave the failed bay empty until a replacement arrives.
B.Replace the drive, then manually initialize the array from the controller BIOS to force a rebuild.
C.Power down the server, replace the drive, then power on and let the controller rebuild automatically.
D.Remove the failed drive, insert the replacement, and allow the controller to rebuild the array onto it.
AnswerD

With a hot-swap backplane, the failed drive can be pulled and the replacement inserted while the server runs. The RAID controller detects the new member and begins rebuilding, using the redundant parity or the hot spare's data as needed, so service continues with no downtime.

Why this answer

Hot-swap drive bays and backplanes allow a failed member to be removed and replaced while the server runs. Once the controller detects the new drive, it rebuilds the array automatically, restoring redundancy without interrupting service. RAID 6 can tolerate two simultaneous failures, and the hot spare adds another layer of protection during the rebuild window.

Exam trap

The trap here is assuming a rebuild requires either a power cycle or a manual controller action, when hot-swap replacement and automatic rebuild are the intended workflow.

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60
MCQmedium

A server administrator is tasked with installing a new PCIe SSD into a server that will be used for a high-transaction database. The server has available PCIe 4.0 x16 slots. Which of the following should the administrator consider to maximize performance?

A.Use a PCIe riser card to install the SSD vertically
B.Configure the slot to run in PCIe 3.0 mode for compatibility
C.Ensure the SSD is installed in a slot with direct CPU lanes rather than chipset lanes
D.Install the SSD in the slot closest to the power supply
AnswerC

PCIe slots connected directly to the CPU provide lower latency and higher bandwidth than those routed through the chipset. For a high-transaction database, minimizing latency is critical. Chipset lanes may share bandwidth with other peripherals, causing contention. Installing the SSD in a CPU-attached slot ensures it gets full PCIe 4.0 x16 bandwidth without competing with other devices.

Why this answer

To maximize performance, the PCIe SSD should be installed in a slot with direct CPU lanes. CPU-attached slots provide dedicated bandwidth and lower latency compared to chipset-attached slots, which may share bandwidth. Physical placement, riser cards, or downgrading to PCIe 3.0 do not improve performance and can introduce bottlenecks or compatibility issues.

Exam trap

The trap here is assuming that any available PCIe slot provides the same performance, when CPU-attached slots are superior for latency-sensitive workloads.

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61
MCQmedium

A technician is tasked with installing a new 2U server into a rack that currently has two servers. The rack is located in a small server room with limited airflow. The technician notices that the rack does not have a blanking panel installed above the new server. What is the most likely consequence of not installing the blanking panel?

A.Hot air recirculation causing overheating of components
B.Increased cooling efficiency due to better air circulation
C.Electromagnetic interference affecting network signals
D.Increased power consumption due to higher fan speeds
AnswerA

In a rack, cold air is drawn from the front and hot air is expelled at the rear. If there are empty spaces, such as above the new server, hot exhaust air can recirculate back to the front intake, especially in a room with limited airflow. This raises the intake temperature, potentially causing components to overheat and leading to thermal throttling or shutdown. Installing blanking panels fills these gaps, preventing recirculation and maintaining proper front-to-back airflow. Thus, this is the most likely consequence.

Why this answer

Blank server rack units allow hot exhaust air to recirculate to the front intake, especially in confined spaces with limited airflow. This raises intake temperatures and can cause overheating. Blanking panels are inexpensive and easy to install; they block these gaps and ensure that cold air from the front is drawn through the servers and exhausted out the back.

This maintains proper cooling and prevents thermal issues. Therefore, the most likely consequence of omitting the blanking panel is hot air recirculation and overheating.

Exam trap

The trap here is assuming that empty rack space improves airflow, when in fact it disrupts the front-to-back cooling path and causes hot air recirculation.

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62
PBQeasy

A small business has purchased a new server to function as a file server for 25 employees. The server is equipped with four 1TB SATA hard disk drives and no hardware RAID controller; the operating system supports software RAID. The business owner's primary requirements are data redundancy to protect against a single drive failure and maximum usable storage capacity, while keeping costs low. The IT technician is tasked with configuring the storage. The technician evaluates the following options: RAID 0 striping across all four drives; RAID 1 mirroring using two pairs (drives 1+2 mirrored, drives 3+4 mirrored), providing two separate volumes; RAID 5 with parity across all four drives; and RAID 10 combining mirroring and striping. The technician needs to recommend the configuration that best meets the requirements. Which of the following should the technician implement?

A.Configure RAID 10 by mirroring two pairs and striping across them, providing 2TB of storage with high performance and redundancy.
B.Configure RAID 5 to stripe data and parity across all four drives, providing 3TB of usable storage with single-drive fault tolerance.
C.Configure RAID 0 to stripe across all four drives for maximum 4TB storage and performance.
D.Configure RAID 1 with two mirrored pairs, providing 2TB of total storage across two volumes, ensuring redundancy.
AnswerB

Why this answer

RAID 5 stripes data and parity across all four drives, providing 3TB of usable storage (4TB raw minus 1TB for parity) and can tolerate a single drive failure. This meets the requirements for data redundancy against a single drive failure and maximum usable storage capacity while keeping costs low, as it uses all four drives efficiently without additional hardware.

Exam trap

SK0-005 often tests the trade-off between usable capacity and redundancy in RAID levels, tricking candidates into choosing RAID 10 for performance when the requirement emphasizes maximum usable storage and cost-effectiveness, or RAID 0 for capacity when redundancy is required.

How to eliminate wrong answers

Option A is wrong because RAID 10 provides only 2TB of usable storage (50% overhead) and requires more drives for the same capacity, which does not maximize usable storage. Option C is wrong because RAID 0 provides no redundancy; a single drive failure results in total data loss. Option D is wrong because RAID 1 with two mirrored pairs provides only 2TB of usable storage and creates two separate volumes, which does not maximize capacity and adds management complexity.

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63
MCQeasy

A technician is replacing a failed hard drive in a server that uses a hardware RAID controller. The server is running Windows Server 2019. After physically installing the new drive, which of the following should the technician do to make the drive part of the array?

A.Assign the drive as a hot spare in the RAID controller BIOS/UEFI.
B.Run the diskpart command to create a new volume.
C.Initialize the disk in Disk Management.
D.Add the drive to the existing array using the RAID controller management utility.
AnswerD

When a drive fails in a hardware RAID array, the replacement drive must be added to the array to initiate a rebuild. This is typically done through the RAID controller's management utility, either in the BIOS/UEFI or via a vendor-specific tool in the OS. The controller will then reconstruct the data onto the new drive. This is the correct and direct method to restore redundancy.

Why this answer

For a hardware RAID array, the replacement drive must be added to the array via the RAID controller's management interface. This triggers the rebuild process, restoring redundancy. Operating system tools like Disk Management or diskpart do not control hardware RAID membership; they operate on logical volumes presented by the controller.

Exam trap

The trap here is assuming that operating system disk management tools can manage hardware RAID arrays, when in fact they only see the logical volumes presented by the RAID controller.

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64
MCQeasy

A technician is monitoring a server with a RAID 5 array that has a hot spare. One of the drives fails. Which of the following actions will occur automatically in this configuration?

A.The server will shut down to protect data
B.The array will continue to operate in degraded mode until manual intervention
C.The data will be mirrored to another server
D.The hot spare will be activated and the array will start rebuilding
AnswerD

With RAID 5 plus a hot spare, the controller detects the failed member and automatically rebuilds parity onto the idle spare drive, restoring redundancy without manual intervention. This satisfies the stem's requirement for an automatic action, unlike configurations lacking a standby disk.

Why this answer

In a RAID 5 array with a hot spare, when a drive fails, the controller automatically activates the hot spare and begins rebuilding the array using parity data from the remaining drives. This restores redundancy without manual intervention, keeping the array operational and protected.

Exam trap

SK0-005 often tests the confusion between hot spare (automatic rebuild) and manual intervention, or between RAID and remote replication.

How to eliminate wrong answers

Option A is wrong because RAID 5 with a hot spare is designed for automatic recovery, not server shutdown. Option B is wrong because a hot spare eliminates the need for manual intervention; the array rebuilds automatically. Option C is wrong because RAID is local disk redundancy, not data mirroring to another server — that would be a remote replication or cluster technology.

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65
MCQmedium

A server administrator is configuring a new server with four 10GbE network interfaces. The server will host a high-traffic web application that requires maximum throughput and redundancy. Which of the following configurations should the administrator implement?

A.Configure all four interfaces in an active-active NIC team using LACP (802.3ad).
B.Enable load balancing using ALB (Adaptive Load Balancing) without switch configuration.
C.Set up NIC teaming in active-passive mode using two interfaces, leaving the other two as standby.
D.Assign each interface to a separate VLAN to distribute traffic across multiple subnets.
AnswerA

Active-active NIC teaming with LACP aggregates all four interfaces into a single logical link, providing both increased throughput and redundancy. If one interface fails, traffic continues on the remaining links. This maximizes bandwidth and ensures high availability. It is the optimal configuration for a high-traffic web application requiring maximum throughput.

Why this answer

LACP (802.3ad) allows multiple network interfaces to be aggregated into a single logical link, providing both increased throughput and redundancy. Active-active mode ensures all interfaces are utilized, maximizing bandwidth. This is ideal for a high-traffic web application.

Other options either do not increase throughput or lack the same level of redundancy and performance.

Exam trap

The trap here is thinking that active-passive teaming increases throughput, when it only provides redundancy.

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66
MCQmedium

A server fails to power on after a technician replaced the power supply unit (PSU). The technician notices the server's LEDs are off and no fans are spinning. Which of the following should the technician do FIRST?

A.Replace the PSU with another new unit
B.Replace the motherboard
C.Verify the incoming power is within acceptable voltage range
D.Check that the new PSU is properly seated and all power cables are connected
AnswerD

A brand-new PSU with no LEDs or fan activity usually means it is not receiving mains power or is not fully seated. Reseating the unit and verifying the ATX and CPU power connectors is the cheapest, most likely fix before swapping hardware or escalating.

Why this answer

After replacing a PSU, the most common cause of a no-power condition (no LEDs, no fans) is that the new PSU is not fully seated in its slot or that the ATX/EPS power cables (24-pin main, 8-pin CPU, and any PCIe) are not fully connected. Verifying physical connections is a zero-cost, non-destructive first step that resolves the majority of post-replacement failures before assuming a defective part. Only after confirming proper seating and cabling should the technician move on to more invasive diagnostics.

Exam trap

The trap here is the urge to jump to component replacement (PSU or motherboard) instead of following the standard troubleshooting order — always verify the simplest physical cause (seating and cabling) before swapping parts.

How to eliminate wrong answers

Option A is wrong because replacing the PSU again is premature — the technician has not yet verified that the current PSU is actually defective, and swapping parts without confirming the fault is a waste of time and money. Option B is wrong because replacing the motherboard is a drastic, expensive step that should only be considered after ruling out power delivery issues; a completely dead board with no LEDs is far more likely to be a cabling/seating problem than a failed motherboard. Option C is wrong because while verifying incoming voltage is a valid check, it is not the FIRST step — the technician just physically replaced the PSU, so the most probable fault is in the work just performed (seating/cables), not the wall power that presumably worked before.

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67
PBQmedium

A small business plans to deploy a new on-premises server for a virtualization environment. The server will run a hypervisor hosting four virtual machines: a domain controller, a file server, a web application server, and an SQL database server. The business expects moderate workloads and needs to ensure reliable performance and data protection. The procurement department has proposed the following server configuration: single Intel Xeon E-2300 series CPU (4 cores, 8 threads), 16 GB DDR4 ECC RAM, two 1 TB SATA hard drives configured in RAID 1, a single 1 GbE network interface, and a 500W power supply. The IT manager reviews the proposal and identifies several deficiencies that will not meet the expected workload requirements. Which of the following changes to the server configuration is the MOST important to address first to ensure the VMs can run effectively?

A.Increase the RAM to at least 32 GB to support the four VMs.
B.Replace the SATA hard drives with SSDs and configure RAID 10 for better I/O performance.
C.Add a second 1 GbE network interface and configure NIC teaming for redundancy.
D.Upgrade the CPU to a model with at least 8 cores and 16 threads.
AnswerA

Why this answer

With only 16 GB of RAM, running four VMs (domain controller, file server, web app server, and SQL database server) is not feasible — the hypervisor itself consumes memory, and each VM needs a baseline allocation. SQL Server alone typically requires 8+ GB, and a domain controller plus file/web servers easily consume the rest, so insufficient RAM is the most immediate blocker to running the VMs effectively.

Exam trap

SK0-005 often tests prioritization: candidates may focus on storage or CPU upgrades because they sound more 'performance-oriented,' but the question asks for the MOST important first fix, which is the resource that prevents VMs from running at all — RAM.

How to eliminate wrong answers

Option B is wrong because while SSDs and RAID 10 would improve I/O, the question asks for the MOST important change first; without adequate RAM, the VMs cannot even run, making storage a secondary concern. Option C is wrong because NIC teaming provides redundancy and some throughput improvement, but a single 1 GbE link is generally sufficient for moderate workloads and does not prevent VMs from running. Option D is wrong because while 4 cores/8 threads is modest, it can still host four moderate VMs; RAM exhaustion is a harder limit that causes swapping and VM failures.

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68
PBQhard

A company has a virtualized server environment with two physical hosts running VMware vSphere. Each host has 2 CPUs, 128GB RAM, and 6x 600GB SAS drives in RAID 10. Recently, host A experienced a power surge that caused it to shut down abruptly. After restarting, the host boots but the RAID controller reports that one of the drives in the RAID 10 array is missing. The administrator has a replacement drive of the same model. What should the administrator do first?

A.Use the RAID controller utility to set the new drive as a hot spare and then reboot
B.Replace the missing drive with the new one and allow the RAID controller to automatically rebuild
C.Check the RAID controller logs to determine if the drive is faulty or if it's a connection issue, and then reseat the drive or replace cables before replacing
D.Rebuild the entire RAID array after backing up data from the surviving drives
AnswerC

Why this answer

Before replacing a drive, the administrator should check the RAID controller logs to determine whether the drive is actually faulty or if the issue is a connection problem (loose cable, backplane, or power surge damage). Reseating the drive or replacing cables is non-destructive and may resolve the issue without unnecessary drive replacement. Replacing a drive that is not actually faulty can trigger an unnecessary rebuild and risk array degradation.

Exam trap

The trap is jumping to hardware replacement because the symptom says 'drive missing' — the exam tests whether you verify the root cause (cable, backplane, or transient fault) before replacing a drive, since unnecessary replacement can cause more harm than good.

How to eliminate wrong answers

Option A is wrong because setting the new drive as a hot spare does not address the missing drive and may cause the controller to rebuild onto the hot spare while the original drive is still present or recoverable, wasting a drive and risking data. Option B is wrong because replacing the drive immediately assumes the drive is faulty without verifying — if the issue is a cable or backplane, the new drive will also appear missing and the array remains degraded. Option D is wrong because rebuilding the entire array from scratch destroys data and is a drastic, unnecessary step when the array is still functional in a degraded state.

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69
MCQmedium

A technician is preparing to install a new server that will use a hardware RAID controller. The server will host a database requiring high write performance and redundancy. Which of the following RAID levels should the technician configure to meet these requirements?

A.RAID 1
B.RAID 0
C.RAID 5
D.RAID 10
AnswerD

RAID 10 combines mirroring and striping, offering both redundancy and high performance for both reads and writes. It is ideal for write-intensive database workloads because data is striped across mirrored pairs, reducing parity overhead. This meets the requirements for high write performance and redundancy.

Why this answer

RAID 10 provides the best combination of high write performance and redundancy for a database. It stripes data across mirrored pairs, eliminating parity calculations that slow writes in RAID 5. While RAID 1 offers redundancy, its write performance is lower.

RAID 0 lacks redundancy, and RAID 5 has write penalties. Thus, RAID 10 is the appropriate choice.

Exam trap

The trap here is choosing RAID 5 for its balance of performance and redundancy, but it has significant write penalties that RAID 10 avoids.

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70
MCQhard

A datacenter technician is preparing to install a new 2U server that uses a hardware RAID controller with a battery-backed write cache. The server will run a transactional database. The technician wants to ensure the write cache remains enabled during a power loss. Which of the following should the technician verify FIRST?

A.That the RAID controller's battery or supercapacitor is installed, charged, and reported healthy in the controller management utility.
B.That the server's redundant power supplies are connected to two separate PDUs on different utility feeds.
C.That the database is configured with a RAID 10 volume rather than RAID 5 to reduce write amplification.
D.That the operating system write cache is disabled at the volume level to prevent double caching.
AnswerA

A battery-backed or supercapacitor-backed write cache only stays enabled when the cache protection module is present and healthy. If the battery is missing, discharged, or failed, the controller switches to write-through mode to protect data, which severely degrades database write performance. Verifying the cache protection module first confirms the cache can be safely used.

Why this answer

Hardware RAID controllers with battery-backed or supercapacitor-backed write cache enable write-back mode only while cache protection is healthy. If the protection module is missing, charging, or failed, the controller defaults to write-through, which protects data but slows database writes. Confirming the cache protection module is installed and healthy is the first step before expecting write-back performance.

Exam trap

The trap here is focusing on power feed redundancy or RAID level while overlooking that the controller itself will disable write-back caching whenever cache protection is unhealthy.

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71
Multi-Selectmedium

A technician is preparing to add a second processor to a dual-socket server that currently has one CPU installed. The server will run a memory-intensive virtualization workload. Which of the following steps are required for the upgrade to function correctly? (Choose two.)

Select 2 answers
A.Move all existing DIMMs to the slots belonging to the second processor to balance the load.
B.Reinstall the operating system so it can detect the additional processor sockets.
C.Populate the memory slots associated with the new processor according to the server's population rules.
D.Verify that both processors are the same model, stepping, and TDP as supported by the server's firmware.
E.Disable hyper-threading in firmware so the second processor's cores are recognized.
AnswersC, D

Each processor has its own integrated memory controller and directly attached DIMM slots. If the slots for the second CPU are left empty or populated in the wrong order, the system may fail to boot or lose memory capacity and interleaving benefits, so the population rules must be followed.

Why this answer

Adding a second physical processor requires a matched CPU that the firmware supports, and it requires memory to be installed in the DIMM slots wired to that processor's integrated memory controller. Without matched CPUs the system may not POST, and without populated local memory the new socket cannot operate correctly.

Exam trap

The trap here is treating the CPU as a drop-in part and overlooking that each socket owns its own memory channels that must be populated.

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72
MCQmedium

A technician is adding a second CPU to a previously single-socket 2U server. The server boots but the operating system reports only half of the newly installed CPU's memory channels as populated, and total RAM is lower than expected. Which of the following is the MOST likely cause?

A.The system BIOS requires a firmware downgrade to recognize the second CPU's memory controller.
B.The second CPU's integrated memory controller failed and must be replaced under warranty.
C.The DIMMs for the second CPU were not populated according to the memory population guidelines for that socket.
D.The second CPU was installed in the wrong socket orientation and is running at reduced capacity.
AnswerC

Each CPU owns its own memory controller and DIMM slots. If the second socket's DIMMs are not installed in the slots and order the platform's population rules require, the system disables the unpopulated channels, so the OS sees fewer channels and less total RAM. Following the vendor population table per socket resolves the shortfall.

Why this answer

A second physical CPU brings its own memory controller and DIMM slots, and those slots must be filled following the platform's population rules. When slots are left unpopulated in the required order, the corresponding channels are disabled and the OS reports less memory and fewer channels than installed. Verifying the vendor population table for the second socket restores full capacity.

Exam trap

The trap here is assuming a working CPU automatically enables all its memory channels regardless of how the DIMMs are seated.

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73
MCQmedium

A server displays a 'CMOS battery low' error during POST. After the technician replaces the CR2032 battery with a new one, the server still loses date and time settings when disconnected from power. Which of the following should the technician try NEXT?

A.Check the power supply for voltage fluctuations
B.Update the BIOS firmware
C.Replace the motherboard
D.Verify the new battery is functional and properly seated
AnswerD

A 'dead on arrival' battery or poor contact is a common cause. Checking with a multimeter or trying another new battery is the logical next step.

Why this answer

Option A is correct because it is possible the new battery is defective, installed incorrectly, or not making proper contact. The first step is to verify the battery itself and its installation. Option B is wrong because a faulty motherboard is possible, but troubleshooting should start with the simplest and most likely cause.

Option C is wrong because power supply fluctuations are unlikely to cause CMOS settings loss specifically when unplugged. Option D is wrong because the BIOS chip retaining settings is part of the CMOS circuit, but the immediate issue is likely the power source (battery) for the CMOS.

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74
MCQhard

A server administrator is troubleshooting a newly installed 4U storage server whose fans run at maximum speed continuously even though inlet temperatures read normal. The chassis uses a passive backplane with eight high-capacity 3.5-inch drives, and the administrator recently replaced three drives with higher-RPM models. Which of the following is the MOST likely cause?

A.The server's ambient humidity is too low, causing static buildup that interferes with fan control signals
B.The higher-RPM drives generate more heat, and the BMC is ramping fans to protect them based on drive temperature sensors
C.The fan profile was reset to a performance curve during a recent firmware update and must be returned to optimal
D.The passive backplane is failing and reporting false temperature readings to the BMC
AnswerB

This is correct because higher-RPM drives dissipate more heat, and intelligent platforms monitor per-drive temperatures through the backplane and raise fan speed to keep them within limits. Normal inlet temperature does not mean drive temperatures are normal; the BMC acts on the hottest sensor in the airflow path, so a few hotter drives can drive fans to maximum even when ambient looks fine.

Why this answer

Higher-RPM drives run hotter, and the baseboard management controller raises fan speed based on the hottest monitored sensor, including per-drive temperatures reported through the backplane. Normal inlet readings do not rule this out. Firmware profile drift, a failing backplane, or humidity effects do not fit the timing or mechanism as well as the direct thermal consequence of the drive upgrade.

Exam trap

The trap here is trusting the normal inlet temperature reading and overlooking that the BMC responds to the hottest drive sensor, not ambient air.

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75
Multi-Selectmedium

A technician is preparing to add four new hot-swap SAS drives to a running server that uses a hardware RAID controller. Before inserting the drives, which of the following actions should the technician take? (Choose two.)

Select 2 answers
A.Set each new drive's SAS address to match the controller's expected value
B.Confirm the drives are on the RAID controller's compatibility list
C.Verify the drive bays are not part of an existing array before insertion
D.Install the drives while the server is powered off to avoid damaging the backplane
E.Update the RAID controller firmware to the latest release immediately before insertion
AnswersB, C

Hardware RAID controllers validate drive model, firmware, and sometimes OEM branding before allowing a drive to join an array. An unsupported drive may be rejected, drop out of the array, or operate without proper error reporting, so verifying compatibility before insertion prevents a failed rebuild or a degraded virtual disk in production.

Why this answer

Before adding hot-swap drives, the technician must confirm the drives are supported by the RAID controller and that the chosen bays are free of existing array membership. Compatibility prevents rejection or dropout, and confirming empty bays prevents an accidental rebuild that would overwrite the newly inserted drive.

Exam trap

The trap here is treating hot-swap drives as plug-and-play with no prerequisites, when controller compatibility and bay membership must be checked first.

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