easymultiple choiceObjective-mapped

A technician is building a desktop PC. After installing the motherboard, CPU, and RAM, the technician attempts to power on the system. The fans spin for a second and then stop. The motherboard's power LED does not light up. The technician has confirmed the power supply is functional by testing with a multimeter. Which of the following is the MOST likely cause?

Question 1easymultiple choice
Full question →

A technician is building a desktop PC. After installing the motherboard, CPU, and RAM, the technician attempts to power on the system. The fans spin for a second and then stop. The motherboard's power LED does not light up. The technician has confirmed the power supply is functional by testing with a multimeter. Which of the following is the MOST likely cause?

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Distractor review

The CMOS battery is dead.

A dead CMOS battery can cause BIOS settings to reset but does not prevent the system from powering on. The system would still boot and display an error. It would not cause the power LED to remain off.

B

Best answer

The 4/8-pin CPU power connector is not connected.

The CPU power connector (EPS12V) provides dedicated power to the CPU. Without it, the motherboard may begin to power on (fans start) but then immediately shut down because the CPU does not receive power. The 24-pin main power connector supplies power to the motherboard itself, but additional CPU power is required.

C

Distractor review

The RAM is installed in the wrong slots.

Incorrect RAM slot installation may cause no POST or beep codes, but the system typically does not shut down immediately; it stays powered on with no display. Also, the power LED usually lights up if the motherboard is receiving power.

D

Distractor review

The front panel power switch headers are incorrectly connected.

If the power switch headers are incorrectly connected, pressing the power button might not start the system at all. The scenario describes the system starts briefly, indicating the power button is working correctly.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Related practice questions

Related 220-1101 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

Question 1

A user reports intermittent network connectivity on a desktop computer. The technician observes that the Ethernet link light on the NIC turns off for a few seconds and then turns back on. The cable passes a wiremap test, the switch port is verified good with another device, and the NIC driver is updated. The issue occurs more frequently when the computer's case fan runs at high speed. Which of the following is the MOST likely cause?

Question 2

A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)

Question 3

A workstation is connected to a managed switch. It obtains a valid IP address (192.168.10.50) from the DHCP server, but it cannot ping the default gateway (192.168.10.1). The link light on both the workstation NIC and the switch port are solid green. Other workstations on the same switch CAN ping the default gateway successfully. The technician accesses the switch management interface and finds that the workstation's port is configured as an access port on VLAN 10. The default gateway is located on VLAN 20. An inter-VLAN router is configured but not explicitly allowing VLAN 10 access to VLAN 20. Which of the following is the MOST likely cause of the problem?

Question 4

A company develops a web application that relies on a custom library available only for a specific Linux distribution. They want to deploy the application in the cloud with minimal administrative overhead, but they need full control over the software stack, including the ability to install the custom library and configure the web server. Which cloud service model BEST meets these requirements?

Question 5

A company has a legacy virtual machine running on a deprecated hypervisor (Hyper-V). They want to migrate this VM to a new hypervisor (VMware vSphere) hosted in a private cloud while preserving the VM's configuration, installed applications, and data. The migration must be performed with minimal downtime. Which of the following methods is MOST appropriate?

Question 6

A company hosts a critical database on a virtual machine in a public cloud. The database requires persistent storage that must be retained even if the VM is terminated. The storage must also be accessible from multiple VMs simultaneously for a future high-availability configuration. Which type of cloud storage BEST meets these requirements?

FAQ

Questions learners often ask

What does this 220-1101 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: The 4/8-pin CPU power connector is not connected. — The most likely cause is that the 4/8-pin CPU power connector (EPS12V) is not connected. This connector provides dedicated power to the CPU, and without it, the motherboard may begin to power on (fans spin briefly) but then immediately shut down because the CPU does not receive power. The 24-pin main power connector supplies power to the motherboard, but the CPU requires its own power source. The power LED may not illuminate if the CPU power is missing. Other options, such as a dead CMOS battery or incorrect front panel headers, would typically not cause the system to power on briefly and then shut down.

What should I do if I get this 220-1101 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

Discussion

Loading comments…

Sign in to join the discussion.