CompTIA A+ Core 1 Practice Questions: Troubleshooting

11 free, exam-style CompTIA A+ Core 1 (220-1201) practice questions covering 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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Troubleshooting practice questions

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

Q1. According to CompTIA's troubleshooting methodology, what is the step that should be performed immediately AFTER establishing a theory of probable cause?

  • A.Identify the problem.
  • B.Test the theory to determine the cause.✓ Correct
  • C.Establish a plan of action to resolve the problem.
  • D.Verify full system functionality.
Explanation: After identifying the problem and establishing a theory, the next logical step in the CompTIA troubleshooting methodology is to test that theory. If the theory is not confirmed, a new theory must be established or the problem escalated. Learn more.

Q2. According to CompTIA's troubleshooting methodology, after you have implemented a plan of action and verified full system functionality, what is the final step to ensure proper resolution and future prevention?

  • A.Re-establish a new theory of probable cause.
  • B.Escalate the problem to a higher-level technician.
  • C.Document the findings, actions, and outcomes.✓ Correct
  • D.Immediately undo all changes made.
Explanation: The final step in CompTIA's troubleshooting methodology is to document the problem, the actions taken to resolve it, and the successful outcome. This creates a knowledge base for future issues and improves efficiency. Learn more.

Q3. What is the first step in the CompTIA troubleshooting methodology?

  • A.Establish a theory of probable cause
  • B.Identify the problem✓ Correct
  • C.Test the theory to determine the cause
  • D.Document findings
Explanation: The first step is always to Identify the Problem. This involves questioning the user, identifying changes, and backing up data before making changes. Learn more.

Q4. What does a blue screen of death (BSOD) indicate?

  • A.Hardware failure
  • B.Driver conflict
  • C.Memory error
  • D.All of the above✓ Correct
Explanation: BSODs result from critical kernel-level errors. Learn more.

Q5. Which command checks disk health in Windows?

  • A.chkdsk
  • B.sfc
  • C.wmic diskdrive get status✓ Correct
  • D.diskpart
Explanation: WMIC checks SMART status for disk health. Learn more.

Q6. Which Windows command rebuilds the BCD store?

  • A.bootrec /rebuildbcd✓ Correct
  • B.sfc /scannow
  • C.chkdsk /f
  • D.diskpart
Explanation: bootrec fixes boot configuration issues. Learn more.

Q7. Which Windows tool shows application event logs?

  • A.Task Manager
  • B.Event Viewer✓ Correct
  • C.Performance Monitor
  • D.Registry Editor
Explanation: Event Viewer logs system/application events. Learn more.

Q8. What does a yellow exclamation mark in Device Manager indicate?

  • A.Disabled device
  • B.Driver error✓ Correct
  • C.Hardware failure
  • D.Unoptimized settings
Explanation: Typically a driver issue. Learn more.

Q9. What does a POST card diagnose?

  • A.Network connectivity
  • B.Boot process errors✓ Correct
  • C.Power supply issues
  • D.Display failures
Explanation: POST cards display BIOS error codes. Learn more.

Q10. What is the purpose of a Windows recovery drive?

  • A.Backup personal files
  • B.Reinstall the OS
  • C.Fix boot issues✓ Correct
  • D.All of the above
Explanation: Recovery drives troubleshoot startup problems. Learn more.

Q11. According to CompTIA's troubleshooting methodology, what is the step that should be performed immediately AFTER a theory of probable cause has been established?

  • A.Identify the problem symptoms and user changes.
  • B.Test the theory to determine the actual cause.✓ Correct
  • C.Establish a plan of action to resolve the problem and implement the solution.
  • D.Verify full system functionality and, if applicable, implement preventative measures.
Explanation: The CompTIA troubleshooting methodology follows a logical sequence. After identifying the problem and establishing a theory of probable cause, the next step is to test that theory to confirm if it's the correct cause of the issue before proceeding to a plan of action. Learn more.

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