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CCNA IT Concepts and Terminology Questions

29 of 104 questions · Page 2/2 · IT Concepts and Terminology · Answers revealed

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76
MCQmedium

A technician is troubleshooting a user's inability to access the internet. The user can ping the default gateway but cannot ping external websites. What is the most likely issue?

A.Firewall is blocking all outbound traffic
B.Default gateway is down
C.IP address is misconfigured
D.DNS server is not configured or is unreachable
AnswerD

Pinging external sites by name fails if DNS is not resolving.

Why this answer

The user can ping the default gateway, which confirms that the local network configuration (IP address, subnet mask, and gateway) is correct and that Layer 3 connectivity to the router is working. However, pinging external websites fails because the DNS server is not configured or unreachable, preventing the resolution of domain names to IP addresses. This is a classic symptom: internal connectivity works, but name resolution fails.

Exam trap

The trap here is that candidates often assume a firewall is blocking traffic (Option A) when they see internet failure, but the ability to ping the gateway proves Layer 3 connectivity is intact, pointing instead to a DNS resolution issue.

How to eliminate wrong answers

Option A is wrong because if the firewall were blocking all outbound traffic, the ping to the external website's IP address would also fail, but the user can ping the default gateway, indicating outbound traffic is not entirely blocked. Option B is wrong because if the default gateway were down, the user could not ping it successfully; the gateway is reachable. Option C is wrong because if the IP address were misconfigured (e.g., wrong subnet or gateway), the user would not be able to ping the default gateway; successful gateway ping confirms correct IP configuration.

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77
MCQmedium

Refer to the exhibit. A user on this computer can browse the internet but cannot ping another computer at 192.168.1.20. What is the most likely cause?

A.The default gateway is incorrect
B.The DNS server is unreachable
C.A firewall is blocking ICMP traffic
D.The subnet mask is wrong
AnswerC

Firewalls often block ping (ICMP) while allowing other traffic.

Why this answer

The user can browse the internet, which confirms that the default gateway, DNS resolution, and subnet mask are correctly configured. However, the ping command fails specifically to 192.168.1.20, a local address. This indicates that ICMP traffic (used by ping) is being blocked, most likely by a firewall on the target computer or an intermediate device, while other traffic (HTTP/HTTPS) is permitted.

Exam trap

The trap here is that candidates assume a failed ping always indicates a network connectivity problem, but CompTIA tests the understanding that ICMP can be selectively blocked by a firewall while other traffic continues to work.

How to eliminate wrong answers

Option A is wrong because if the default gateway were incorrect, the user would not be able to browse the internet (traffic would have no route to external networks). Option B is wrong because DNS is used for name resolution, not for IP-based communication; since the user is pinging an IP address (192.168.1.20) and can browse the internet (which relies on DNS), DNS is functioning correctly. Option D is wrong because a wrong subnet mask would prevent communication with both local and remote hosts, but the user can browse the internet and likely communicate with other local hosts; the specific failure to ping 192.168.1.20 points to a per-host or per-protocol restriction, not a subnet mask issue.

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78
MCQhard

A system administrator is reviewing a security policy that specifies that users must be uniquely identified and access must be audited. Which principle of the CIA triad is being addressed?

A.Availability
B.Integrity
C.Accountability
D.Confidentiality
AnswerC

Accountability ensures user actions are traceable through identification and auditing.

Why this answer

The scenario describes a security policy requiring unique identification and auditing of access. These are the core components of accountability, which ensures that actions can be traced back to a specific user. While accountability is not one of the three classic CIA triad principles (Confidentiality, Integrity, Availability), it is often considered an extension or supporting principle that relies on identification, authentication, and audit logs to enforce non-repudiation.

Exam trap

The trap here is that candidates often confuse accountability with confidentiality, because both involve user identification, but accountability specifically requires auditing and traceability of actions, not just access control.

How to eliminate wrong answers

Option A is wrong because availability ensures that systems and data are accessible when needed, often through redundancy and fault tolerance, not through user identification or auditing. Option B is wrong because integrity protects data from unauthorized modification, ensuring accuracy and consistency, but does not inherently require unique user identification or audit trails. Option D is wrong because confidentiality restricts access to authorized users only, but the policy's explicit mention of auditing and unique identification goes beyond simple access control to establish traceability, which is the hallmark of accountability.

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79
MCQeasy

Which type of computer memory loses its data when the power is turned off?

A.HDD
B.ROM
C.RAM
D.SSD
AnswerC

RAM is volatile and loses data when power is off.

Why this answer

RAM (Random Access Memory) is volatile memory, meaning it requires continuous electrical power to retain data. When the power is turned off, the electrical charges in the memory cells dissipate, causing all stored data to be lost. This is why RAM is used for temporary storage of actively running programs and data.

Exam trap

The trap here is that candidates often confuse 'memory' with 'storage' and mistakenly think HDDs or SSDs lose data on power loss, or they assume ROM is volatile because it is 'read-only' and cannot be easily modified.

How to eliminate wrong answers

Option A is wrong because an HDD (Hard Disk Drive) is a non-volatile storage device that uses magnetic platters to retain data even when power is off. Option B is wrong because ROM (Read-Only Memory) is non-volatile and retains its data permanently, even without power, as it is used for firmware and boot instructions. Option D is wrong because an SSD (Solid State Drive) is also non-volatile, using NAND flash memory to store data persistently without power.

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80
MCQmedium

A technician is troubleshooting a computer that won't boot. The system emits a series of beeps. What is the best resource to interpret the beep codes?

A.The motherboard manual
B.The BIOS manufacturer's website
C.The computer case documentation
D.The operating system help
AnswerA

The motherboard manual includes a list of beep codes and their meanings for that specific model.

Why this answer

Beep codes are specific to the motherboard's BIOS; the motherboard manual is the most authoritative source.

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81
MCQeasy

A user is trying to install a new printer driver on a Windows 10 workstation but receives an error stating the driver is not signed. Which security concept is most directly involved?

A.Availability
B.Integrity
C.Confidentiality
D.Authentication
AnswerD

Driver signing authenticates the publisher and ensures the driver hasn't been modified.

Why this answer

Driver signing is a mechanism that verifies the publisher's identity and ensures the driver has not been tampered with. This directly relates to integrity, not authentication. Authentication is about verifying identity (e.g., user login), but the error here is about the driver's digital signature, which protects integrity.

Option D is incorrect because authentication is not the primary concept involved.

Exam trap

The trap here is confusing authentication (verifying identity) with integrity (verifying data has not been altered), leading candidates to pick 'Authentication' when the core issue is driver integrity via digital signatures.

How to eliminate wrong answers

Option A is wrong because availability concerns uptime and access to resources, not driver signing. Option B is correct; integrity ensures data has not been altered, and driver signing validates the driver's integrity. Option C is wrong because confidentiality protects data from unauthorized disclosure, not driver signing.

Option D is wrong because authentication verifies identity (e.g., user credentials), not the integrity of a driver.

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82
MCQmedium

A user receives an 'Insufficient memory' error when opening a large spreadsheet. Which hardware component is most likely insufficient?

A.Hard drive
B.RAM
C.CPU
D.GPU
AnswerB

RAM is directly related to the ability to open large files.

Why this answer

RAM (Random Access Memory) is the primary volatile memory used to hold active data and program instructions for the CPU. When opening a large spreadsheet, the entire file must be loaded into RAM for processing. An 'Insufficient memory' error indicates that the system's RAM is too small to accommodate the spreadsheet's data, causing the operating system to fail the allocation request.

Exam trap

The trap here is that candidates often confuse 'memory' with 'storage' and select the hard drive, not realizing that 'memory' in this context specifically refers to RAM, which is the workspace for active data.

How to eliminate wrong answers

Option A is wrong because the hard drive stores data persistently but does not directly affect the ability to load a file into active memory; insufficient hard drive space would cause a 'disk full' error, not an 'insufficient memory' error. Option C is wrong because the CPU executes instructions and performs calculations; a slow or overloaded CPU would cause sluggish performance or timeouts, not a memory allocation failure. Option D is wrong because the GPU handles graphics rendering and parallel processing for visual output; a spreadsheet's data load does not rely on GPU memory, so insufficient VRAM would cause display artifacts or rendering errors, not an 'insufficient memory' error.

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83
MCQhard

A company's email server is experiencing slow performance. The IT administrator notices high disk I/O wait times. Which component is most likely bottlenecked?

A.CPU
B.Storage
C.Network
D.RAM
AnswerB

High disk I/O wait suggests that the storage subsystem (HDD/SSD) is unable to keep up with requests.

Why this answer

High disk I/O wait times indicate that the storage subsystem is struggling to keep up with read/write requests, causing the CPU to idle while waiting for data from the disk. This is a classic symptom of a storage bottleneck, not a CPU, network, or memory issue.

Exam trap

The trap here is that candidates often confuse high disk I/O wait with a CPU bottleneck, because the CPU appears busy in monitoring tools, but iowait specifically indicates the CPU is stalled waiting for storage, not that it is processing at capacity.

How to eliminate wrong answers

Option A is wrong because high disk I/O wait times specifically show the CPU is idle waiting for storage, not that the CPU itself is overloaded; a CPU bottleneck would manifest as high CPU utilization or queue lengths. Option C is wrong because network bottlenecks typically present as high latency, packet loss, or interface errors, not as elevated disk I/O wait times. Option D is wrong because RAM bottlenecks usually cause high paging activity or out-of-memory errors, which might indirectly increase disk I/O, but the direct symptom of high I/O wait points to the storage device itself, not memory.

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84
MCQhard

You are the IT support technician for a small office with 5 computers, a shared printer, and a router providing internet access. Users report that the network has been slow and intermittent for the past two days. Additionally, print jobs from multiple users are frequently stuck or fail halfway. You have already verified that all network cables are securely connected, restarted the router and printer, and updated the printer drivers. The issue persists. One user mentions that their computer sometimes shows a 'Windows has detected an IP address conflict' notification. Based on this scenario, which course of action should you take next to resolve the most likely root cause?

A.Check for IP address conflicts on the network and assign static IP addresses if necessary
B.Disable Windows Firewall on all computers
C.Reinstall the operating system on all computers
D.Replace the network switch with a new one
AnswerA

An IP address conflict causes intermittent connectivity and can disrupt printer communication; resolving the conflict will restore stability.

Why this answer

Option C (Check for IP address conflicts) is correct because the IP conflict notification strongly indicates that two devices on the network have the same IP address, causing intermittent connectivity and printer issues. Option A (Replace the network switch) is premature and would not resolve a conflict. Option B (Disable the Windows Firewall) is unrelated and could introduce security risks.

Option D (Reinstall the operating system) is too drastic and unlikely to fix an IP conflict.

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85
MCQeasy

A user wants to ensure that a document cannot be edited by others. Which file property should be set?

A.Archive
B.Hidden
C.System
D.Read-only
AnswerD

Read-only prevents modifications to the file.

Why this answer

The read-only property prevents users from modifying or deleting the file's contents, as it restricts write access to the file. When set, any attempt to edit and save the document will result in an error unless the file is saved with a new name or the property is cleared. This is the standard file attribute used in Windows and other operating systems to enforce write protection at the file system level.

Exam trap

The trap here is that candidates confuse the read-only property with the hidden or system attributes, mistakenly thinking that hiding a file or marking it as system will prevent editing, when in fact only read-only enforces write protection at the file system level.

How to eliminate wrong answers

Option A is wrong because the archive attribute is used by backup software to mark files that have been modified since the last backup, and it does not restrict editing. Option B is wrong because the hidden attribute simply hides the file from normal directory listings, but it does not prevent the file from being opened, edited, or deleted by a user who knows its path. Option C is wrong because the system attribute marks a file as critical to the operating system, which can protect it from casual deletion but does not inherently prevent editing; it is intended for OS files, not user documents.

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86
MCQhard

Refer to the exhibit. A user is unable to access the internet but can ping the default gateway. Based on the exhibit, what is the most likely cause?

A.Firewall blocking traffic
B.Duplicate IP address
C.Incorrect DNS server
D.Incorrect subnet mask
AnswerC

If the DNS server is misconfigured or unreachable, the user cannot resolve domain names to IP addresses, even though local connectivity works.

Why this answer

The user can ping the default gateway, which confirms that Layer 3 connectivity to the local network is working and that the firewall is not blocking ICMP traffic. However, the inability to access the internet (by name or IP) while local connectivity works points to a failure in name resolution. An incorrect DNS server address prevents the client from resolving domain names to IP addresses, which is the most likely cause given the symptoms.

Exam trap

The trap here is that candidates often assume 'no internet' means a firewall or routing issue, but the ability to ping the gateway proves Layer 3 connectivity is fine, forcing the focus onto DNS as the missing piece for name-based access.

How to eliminate wrong answers

Option A is wrong because if a firewall were blocking traffic, it would typically block all outbound traffic or specific protocols, but the user can successfully ping the default gateway (which often passes through the same firewall), so a firewall is not the issue. Option B is wrong because a duplicate IP address would cause intermittent connectivity or complete loss of network access, often with an address conflict warning, and would likely prevent pinging the default gateway reliably. Option D is wrong because an incorrect subnet mask would prevent the user from reaching the default gateway at all (since the host would calculate that the gateway is on a different subnet), yet the user can ping the gateway, so the subnet mask must be correct.

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87
MCQeasy

A database administrator wants to enforce that a column only accepts whole numbers. Which data type should be used?

A.Integer
B.String
C.Boolean
D.Float
AnswerA

Integer stores whole numbers without decimals.

Why this answer

The INTEGER data type is specifically designed to store whole numbers without fractional components. In database systems, enforcing a column to accept only whole numbers requires a data type that disallows decimal points, which INTEGER does by definition. Using INTEGER ensures data integrity by rejecting any non-integer input, such as 3.14 or 'abc'.

Exam trap

The trap here is that candidates often confuse FLOAT with INTEGER, assuming FLOAT can store whole numbers, but FLOAT always permits decimal places, which violates the 'whole numbers only' constraint.

How to eliminate wrong answers

Option B (String) is wrong because strings can store any sequence of characters, including non-numeric values like 'hello' or '123.45', and do not enforce numeric constraints. Option C (Boolean) is wrong because Boolean only stores true/false values (often 0 or 1), not arbitrary whole numbers like 42 or -7. Option D (Float) is wrong because Float stores approximate numeric values with decimal points (e.g., 3.14 or 2.0), allowing fractional parts that violate the requirement for whole numbers only.

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88
MCQhard

A company is designing a disaster recovery plan. They need to restore operations within 4 hours and can tolerate up to 1 hour of data loss. Which combination of Recovery Time Objective (RTO) and Recovery Point Objective (RPO) should they set?

A.RTO = 4 hours, RPO = 1 hour
B.RTO = 2 hours, RPO = 1 hour
C.RTO = 4 hours, RPO = 4 hours
D.RTO = 1 hour, RPO = 4 hours
AnswerA

RTO of 4 hours meets the requirement; RPO of 1 hour meets the data loss tolerance.

Why this answer

The Recovery Time Objective (RTO) defines the maximum acceptable downtime to restore operations, which is 4 hours. The Recovery Point Objective (RPO) defines the maximum acceptable data loss measured in time, which is 1 hour. Option A correctly matches these requirements: RTO = 4 hours and RPO = 1 hour.

Exam trap

The trap here is that candidates often confuse RTO and RPO, swapping the values or assuming tighter objectives are always better, rather than matching them precisely to the stated business requirements.

How to eliminate wrong answers

Option B is wrong because it sets RTO = 2 hours, which is stricter than the required 4 hours; while this would meet the requirement, it is not the correct combination as the question asks for the specific values they should set based on the given tolerances. Option C is wrong because it sets RPO = 4 hours, which would allow up to 4 hours of data loss, exceeding the 1-hour tolerance. Option D is wrong because it swaps the objectives: RTO = 1 hour (too strict) and RPO = 4 hours (too lenient), failing both the 4-hour recovery and 1-hour data loss tolerances.

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89
MCQeasy

A technician installs a new network printer. It can communicate with other computers on the same network but no one outside the network can access it. What is the MOST likely cause?

A.Firewall blocking external traffic
B.Incorrect printer driver
C.No IP address configured
D.Faulty Ethernet cable
AnswerA

A firewall often blocks inbound connections from the internet to internal devices.

Why this answer

A firewall is designed to control incoming and outgoing network traffic based on predetermined security rules. If the printer can communicate locally but not with external networks, the most likely cause is that the firewall is blocking inbound traffic from outside the local subnet, preventing external devices from reaching the printer's IP address or port.

Exam trap

The trap here is that candidates may confuse a firewall blocking external traffic with a network connectivity issue, such as a faulty cable or missing IP address, but the key clue is that local communication works fine, isolating the problem to external access control.

How to eliminate wrong answers

Option B is wrong because an incorrect printer driver would affect print job formatting or functionality, not network connectivity or external access. Option C is wrong because if no IP address were configured, the printer would not be able to communicate with any computers on the same network, contradicting the scenario. Option D is wrong because a faulty Ethernet cable would cause a complete loss of network connectivity, not a selective inability to access the printer from outside the local network.

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90
MCQmedium

A small business needs to allow multiple employees to use the same application on their individual computers while ensuring each user has their own settings. Which type of software license is best?

A.Open source
B.Freeware
C.Site license
D.Per-seat license
AnswerD

A per-seat license allows each user to have their own settings and is ideal for this scenario.

Why this answer

Option B is correct because a per-seat license allows installation on multiple computers with per-user tracking. Option A is wrong as it does not cover multiple users. Option C is wrong because it covers an entire site but may not track individual settings.

Option D is wrong because freeware may not support multi-user.

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91
Multi-Selecthard

Which THREE of the following are characteristics of a relational database?

Select 3 answers
A.Schema-less design allows flexible data structures
B.Data is stored in tables with rows and columns
C.Uses Structured Query Language (SQL) for queries
D.Uses a document-based model like JSON
E.Enforces referential integrity through foreign keys
AnswersB, C, E

Tables are the fundamental structure.

Why this answer

A relational database organizes data into tables, where each table consists of rows (records) and columns (attributes). This tabular structure enforces a fixed schema and allows relationships between tables to be defined and queried efficiently. Option B correctly identifies this fundamental characteristic.

Exam trap

The trap here is that candidates confuse the flexible, schema-less nature of NoSQL databases with the rigid, table-based structure of relational databases, leading them to incorrectly select Option A or D.

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92
MCQhard

A computer has 8 GB of RAM installed, but the operating system reports only 7.9 GB usable. What is the most likely reason for this discrepancy?

A.The operating system itself uses too much RAM
B.Some RAM is reserved for hardware devices
C.The operating system is 32-bit
D.The RAM is not installed in dual-channel mode
AnswerB

Integrated graphics or other hardware may reserve a portion of RAM.

Why this answer

The most likely reason is that some RAM is reserved for hardware devices. This is a standard behavior where system resources, such as memory-mapped I/O (MMIO), are allocated to hardware components like the GPU, network adapters, and PCIe devices. This reservation reduces the total usable RAM reported by the operating system, even though 8 GB is physically installed.

Exam trap

The trap here is that candidates often confuse OS overhead (Option A) with hardware reservation, or they incorrectly assume a 32-bit OS limitation (Option C) when the system clearly reports more than 4 GB of usable RAM.

How to eliminate wrong answers

Option A is wrong because the operating system's own memory usage is reported separately as 'in use' or 'cached' memory, not as a reduction in the total 'usable' amount; the discrepancy here is about hardware reservation, not OS overhead. Option C is wrong because a 32-bit operating system would limit total addressable RAM to 4 GB (or less with PAE), not show 7.9 GB usable; the system is clearly using more than 4 GB, so it must be 64-bit. Option D is wrong because dual-channel mode affects memory bandwidth and performance, not the total amount of RAM reported as usable; the discrepancy is a capacity issue, not a speed or configuration issue.

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93
Drag & Dropmedium

Drag and drop the steps to change the desktop background in Windows 10 into the correct order.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order

Why this order

Personalization settings allow changing the desktop background easily.

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94
Matchingmedium

Match each network protocol to its well-known port number.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts
Matches

22

443

53

25

3389

Why these pairings

These are standard well-known port assignments.

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95
MCQhard

An IT department is planning a new server deployment. They need to ensure that if one server fails, another can take over with minimal downtime. Which concept describes this requirement?

A.Disaster recovery
B.Scalability
C.High availability
D.Fault tolerance
AnswerD

Fault tolerance ensures continued operation despite failures, often through redundant components.

Why this answer

The requirement describes a system where a secondary server automatically takes over with minimal downtime upon failure of the primary server. This is the definition of fault tolerance, which uses redundant components (e.g., dual power supplies, RAID, or clustered servers) to ensure continuous operation without interruption. High availability (option C) is related but focuses on maximizing uptime through redundancy and failover, whereas fault tolerance specifically aims for zero or near-zero downtime by masking failures completely.

Exam trap

The trap here is that candidates confuse high availability with fault tolerance, but high availability typically allows for a short failover delay (seconds to minutes), while fault tolerance requires zero downtime by having redundant components operating in parallel, as implied by 'another can take over with minimal downtime.'

How to eliminate wrong answers

Option A is wrong because disaster recovery refers to restoring IT infrastructure and data after a catastrophic event (e.g., natural disaster, cyberattack) using backups and off-site recovery sites, not real-time failover with minimal downtime. Option B is wrong because scalability is the ability to handle increased load by adding resources (e.g., more servers or storage), not the ability to recover from a server failure with minimal downtime. Option C is wrong because high availability (HA) is a broader concept that uses redundancy and failover to achieve uptime (e.g., 99.999%), but it typically involves some downtime during failover (e.g., seconds to minutes), whereas the question specifies 'minimal downtime' and 'another can take over'—this aligns more precisely with fault tolerance, which aims for zero downtime by having redundant systems running in parallel (e.g., active-active clustering).

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96
MCQeasy

You are a support technician for a small company. An employee reports that their desktop computer will not turn on. You have verified that the power cable is securely connected to both the computer and the wall outlet. When you press the power button, you hear a faint clicking sound but the computer does not start. The power supply fan does not spin, and there are no lights on the motherboard. You have tested the wall outlet with a known working device and it provides power. What is the most likely cause of the issue?

A.The CPU is overheated.
B.The power button is not connected properly.
C.The power supply is faulty.
D.The motherboard has failed.
AnswerC

The clicking sound and no fan spin indicate a PSU issue.

Why this answer

The correct answer is C because the symptoms—faint clicking sound, no fan spin, no motherboard lights, and confirmed wall outlet power—strongly indicate a power supply failure. The clicking sound often comes from a relay or overload protection circuit inside the PSU attempting to start but failing due to internal component damage or short circuit. A faulty power supply cannot deliver the necessary voltages (e.g., +3.3V, +5V, +12V) to power the system, explaining the complete lack of activity.

Exam trap

The trap here is that candidates often confuse a clicking sound with a mechanical hard drive issue or a stuck fan, but in a no-power scenario, the clicking is a classic sign of a power supply's protection circuit cycling, not a component failure elsewhere.

How to eliminate wrong answers

Option A is wrong because an overheated CPU would typically cause the system to shut down or throttle after running, not prevent it from powering on at all; the CPU is not involved in the initial power-on sequence until the power supply delivers standby power. Option B is wrong because if the power button were not connected properly, pressing it would produce no electrical signal, so you would not hear any clicking sound from the PSU; the clicking indicates the PSU is receiving the power-on signal but failing. Option D is wrong because a failed motherboard could prevent boot, but the absence of any motherboard lights and the specific clicking sound from the PSU point to a primary power delivery issue rather than a motherboard fault; a motherboard failure would still typically show some standby power indicator if the PSU were functional.

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97
MCQmedium

A network administrator is setting up a small office network for a new startup. The office has five computers, two printers, and one server. The administrator wants to ensure that all devices can communicate with each other and access the internet. The administrator has decided to use a switch and a router. Which of the following configurations is the MOST appropriate?

A.Connect all devices to the switch, then connect the switch to the router
B.Connect the server and printers to the switch, computers to the router
C.Use a hub instead of a switch
D.Connect all devices directly to the router
AnswerA

This allows all devices to communicate locally and access the internet via the router.

Why this answer

A switch creates a local area network (LAN) by forwarding frames based on MAC addresses, allowing all five computers, two printers, and one server to communicate directly. The router provides network address translation (NAT) and a default gateway for internet access, so connecting the switch to the router enables all devices on the switch to reach the internet. This is the standard small office topology because the switch handles internal traffic efficiently at Layer 2, while the router handles Layer 3 routing and internet connectivity.

Exam trap

The trap here is that candidates assume a router can handle all device connections directly, ignoring the practical port count limitation and the fact that a switch is required to scale the LAN beyond the router's built-in ports.

How to eliminate wrong answers

Option B is wrong because connecting computers directly to the router would likely exceed the limited number of LAN ports on a typical consumer or SOHO router (usually 4), and it would force all computer traffic through the router's slower switching fabric, creating a bottleneck and wasting the switch's high-speed backplane. Option C is wrong because a hub operates at Layer 1, repeating all traffic to every port, which causes collisions, halves effective bandwidth, and is unsuitable for a modern network with five computers, printers, and a server; switches are the correct choice for dedicated bandwidth and collision domains. Option D is wrong because most routers have only 4 LAN ports, insufficient for seven devices (five computers, two printers, and one server), and connecting all devices directly to the router would bypass the switch's ability to handle local traffic efficiently, overloading the router's CPU with Layer 2 forwarding.

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98
MCQeasy

A user reports that their computer is slow. Which of the following is the BEST first step to troubleshoot?

A.Replace the hard drive.
B.Upgrade the RAM.
C.Check Task Manager for high resource usage.
D.Reinstall the operating system.
AnswerC

This is the best first step because it provides immediate information about which resources are being heavily used.

Why this answer

Option C is correct because the first step in troubleshooting a slow computer is to identify the cause of the performance issue. Task Manager provides real-time data on CPU, memory, disk, and network utilization, allowing you to pinpoint which process or resource is being overused. This diagnostic approach follows the standard troubleshooting methodology of gathering information before making changes.

Exam trap

The trap here is that candidates often jump to hardware upgrades (RAM or hard drive) as a quick fix, but CompTIA emphasizes a systematic troubleshooting process that begins with observation and data collection, not component replacement.

How to eliminate wrong answers

Option A is wrong because replacing the hard drive is a hardware replacement that should only be considered after confirming the disk is the bottleneck (e.g., 100% active time in Task Manager). Option B is wrong because upgrading RAM is a hardware change that may not address the actual issue, such as a runaway process or malware, and should only be done after checking current memory usage in Task Manager. Option D is wrong because reinstalling the operating system is a drastic, time-consuming step that should be reserved for software corruption or persistent issues after all other troubleshooting has failed.

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99
MCQhard

A software developer is writing a script that needs to run a set of instructions repeatedly until a condition is met. Which programming construct should be used?

A.For loop
B.While loop
C.If-else statement
D.Function definition
AnswerB

While loop repeats as long as a condition is true.

Why this answer

A while loop is the correct construct because it repeatedly executes a block of code as long as a specified condition remains true. This is ideal for scenarios where the number of iterations is not known in advance and depends on a dynamic condition, such as waiting for a file to appear or a network response.

Exam trap

The trap here is that candidates often confuse a while loop with a for loop, mistakenly thinking a for loop can handle unknown iteration counts, but a for loop requires a predefined sequence or counter, while a while loop is designed for condition-based repetition.

How to eliminate wrong answers

Option A is wrong because a for loop is typically used when the number of iterations is known or can be determined before the loop starts, such as iterating over a fixed range or collection. Option C is wrong because an if-else statement executes a block of code only once based on a condition, not repeatedly. Option D is wrong because a function definition is used to encapsulate reusable code, not to control repetition.

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100
Multi-Selectmedium

Which TWO of the following are best practices for creating strong passwords?

Select 2 answers
A.Use a common pattern like 'password123'
B.Avoid using dictionary words or common phrases
C.Use easily remembered personal information like birth dates
D.Include a mix of uppercase, lowercase, numbers, and symbols
E.Write the password on a sticky note and attach it to the monitor
AnswersB, D

Dictionary words are vulnerable to dictionary attacks.

Why this answer

Option B is correct because strong passwords should avoid dictionary words or common phrases, as these are vulnerable to dictionary attacks where attackers use precomputed lists of common words and phrases to crack passwords. Using such patterns significantly reduces the entropy of the password, making it easier to guess or brute-force.

Exam trap

The trap here is that candidates may think 'easily remembered' passwords are acceptable for convenience, but CompTIA emphasizes that security must override memorability, and personal information is a common target for attackers using OSINT (Open Source Intelligence).

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101
MCQmedium

A network technician is explaining to a client why a file transfer over the network is slower than expected. Which factor MOST likely affects transfer speed?

A.Bandwidth
B.File compression
C.File format
D.Encryption
AnswerA

Bandwidth is the maximum data transfer rate and directly affects speed.

Why this answer

Bandwidth is the maximum rate at which data can be transferred over a network path, typically measured in bits per second (bps). A lower bandwidth directly limits the throughput of a file transfer, causing it to take longer regardless of other factors. This is the most fundamental constraint on transfer speed, as it defines the pipe size through which all data must flow.

Exam trap

CompTIA often tests the misconception that encryption or file format directly controls transfer speed, when in fact bandwidth is the primary bottleneck in most network file transfers.

How to eliminate wrong answers

Option B is wrong because file compression reduces the size of the data being transferred, which can actually increase transfer speed by requiring fewer bits to be sent; it does not inherently slow down a transfer. Option C is wrong because file format determines how data is structured on disk, but it does not directly affect the rate at which bits travel across the network; any format can be transferred at the same speed given identical file sizes. Option D is wrong because encryption adds computational overhead for encrypting and decrypting data, which can introduce latency but is not the primary factor limiting transfer speed; bandwidth is still the dominant constraint.

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102
Multi-Selecthard

Which THREE of the following are common troubleshooting steps? (Select THREE).

Select 3 answers
A.Install new software
B.Identify the problem
C.Test the theory to determine cause
D.Escalate to vendor immediately
E.Establish a theory of probable cause
AnswersB, C, E

First step: identify symptoms and scope.

Why this answer

Option B is correct because identifying the problem is the first step in the CompTIA A+ troubleshooting methodology. Without clearly defining symptoms and scope, subsequent steps lack direction. This step involves gathering information from users, duplicating the issue, and identifying any recent changes to the system.

Exam trap

CompTIA often tests the order of the troubleshooting steps, and the trap here is that candidates confuse 'test the theory to determine cause' (step 3) with 'establish a theory of probable cause' (step 2), or they mistakenly include actions like installing software as a step rather than a solution.

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103
MCQmedium

A company wants to secure its wireless network. Which of the following is the BEST practice?

A.Broadcast the SSID
B.Disable MAC filtering
C.Use WEP encryption
D.Change the default administrator password
AnswerD

Default passwords are well-known; changing them prevents easy access.

Why this answer

Changing the default administrator password is the best practice because default credentials are widely known and easily exploited, providing an attacker with full administrative access to the wireless access point or router. This action directly mitigates unauthorized configuration changes, which is a fundamental security measure. In contrast, the other options either weaken security or have no significant protective effect.

Exam trap

The trap here is that candidates often focus on wireless-specific settings like SSID broadcast or encryption, overlooking the critical importance of securing the administrative interface itself, which is a common and easily exploited vulnerability.

How to eliminate wrong answers

Option A is wrong because broadcasting the SSID makes the network visible to anyone, which is not a security practice; hiding the SSID is a weak security measure at best, but broadcasting it is even less secure. Option B is wrong because disabling MAC filtering removes a basic access control layer that can help prevent unauthorized devices from connecting, even though MAC addresses can be spoofed. Option C is wrong because WEP encryption is deprecated and easily cracked with tools like aircrack-ng due to its use of the RC4 cipher and weak IVs, providing no real security.

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104
MCQmedium

Which data structure is best for storing a collection of key-value pairs?

A.Queue
B.Array
C.Dictionary
D.List
AnswerC

Dictionaries store key-value pairs.

Why this answer

A dictionary (also known as a hash map or associative array) is specifically designed to store key-value pairs, allowing efficient insertion, deletion, and lookup based on a unique key. In computing, this structure uses a hash function to compute an index into an array of buckets, enabling average O(1) time complexity for operations, which is ideal for scenarios like caching or configuration settings.

Exam trap

The trap here is that candidates often confuse a list or array with a dictionary because they think of 'indexing' as key-based, but lists/arrays only support integer indices, not arbitrary keys like strings or objects.

How to eliminate wrong answers

Option A is wrong because a queue is a FIFO (First-In, First-Out) data structure used for ordered processing, not for storing key-value pairs. Option B is wrong because an array stores elements indexed by integer positions, not by arbitrary keys, making it unsuitable for associative lookups. Option D is wrong because a list (e.g., linked list or dynamic array) stores elements in a linear sequence, requiring O(n) search time to find a value by key, and does not natively support key-value mapping.

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