CompTIA A+ Core 2 Practice Questions: Operating Systems/Troubleshooting

5 free, exam-style CompTIA A+ Core 2 (220-1202) practice questions covering Operating Systems/Troubleshooting, each with the correct answer and an explanation. Start a timed exam below, or scroll on to read through the questions.

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Operating Systems/Troubleshooting practice questions

Answers and explanations are shown. Take the timed exam above to test yourself first.

Q1. A user reports their computer is running very slowly. Which Windows utility would be BEST to initially check for applications consuming excessive CPU or memory resources?

  • A.Device Manager
  • B.Event Viewer
  • C.Task Manager✓ Correct
  • D.Disk Management
Explanation: Task Manager (specifically the Processes or Details tab) provides a real-time view of running applications and background processes, along with their CPU, memory, disk, and network usage. This helps identify resource-heavy applications. Learn more.

Q2. A user encounters a Blue Screen of Death (BSOD) in Windows with an error message like 'IRQL_NOT_LESS_OR_EQUAL'. This type of error MOST commonly indicates an issue with:

  • A.Hard drive failure
  • B.Faulty RAM or incompatible device driver✓ Correct
  • C.Network connectivity loss
  • D.Malware infection
Explanation: The 'IRQL_NOT_LESS_OR_EQUAL' BSOD error typically points to a problem with a device driver, system service, or incompatible hardware, often related to memory access violations. Faulty RAM can also cause this. Learn more.

Q3. A Windows computer is unable to boot and displays an error related to a missing or corrupt Master Boot Record (MBR). Which command in the Windows Recovery Environment can be used to attempt to repair the MBR?

  • A.chkdsk /r
  • B.sfc /scannow
  • C.bootrec /fixmbr✓ Correct
  • D.diskpart clean
Explanation: The `bootrec /fixmbr` command writes a new MBR to the system partition. This can resolve issues where the MBR has been corrupted or overwritten. It's typically run from the Windows Recovery Environment. Learn more.

Q4. A Windows user encounters a Blue Screen of Death (BSOD) in Windows with an error message like 'IRQL_NOT_LESS_OR_EQUAL'. This type of error MOST commonly indicates an issue with:

  • A.Hard drive failure
  • B.Faulty RAM or incompatible device driver✓ Correct
  • C.Network connectivity loss
  • D.Malware infection
Explanation: The 'IRQL_NOT_LESS_OR_EQUAL' BSOD error typically points to a problem with a device driver, system service, or incompatible hardware, often related to memory access violations. (Relevant for 1101 hardware troubleshooting - RAM/drivers) Learn more.

Q5. A Windows user frequently encounters a Blue Screen of Death (BSOD) with an error message like 'IRQL_NOT_LESS_OR_EQUAL'. This type of error MOST commonly indicates an issue with:

  • A.A failing hard drive or SSD with bad sectors.
  • B.A faulty RAM module or an incompatible/corrupt device driver.✓ Correct
  • C.Persistent network connectivity loss to the default gateway.
  • D.A severe malware infection modifying system files.
Explanation: The 'IRQL_NOT_LESS_OR_EQUAL' BSOD error typically points to a problem where a kernel-mode driver or system service attempted to access paged memory at an invalid Interrupt Request Level (IRQL). This is often caused by faulty RAM, an incompatible device driver, or a problematic system service. Learn more.

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