Core 2: Operating Systems
40 free practice questions with explanations
PassNova has 40 free CompTIA A+ practice questions on Core 2: Operating Systems, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Core 2: Operating Systems: example questions & answers
Here are 6 example questions from this topic. Practise the full set of 40 free in the browser.
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Which Windows command-line tool checks and repairs protected system files?
- A chkdsk
- B sfc /scannow ✓
- C diskpart
- D gpupdate
Answer: System File Checker (sfc /scannow) scans and repairs corrupted protected Windows system files.
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Which command checks a disk for errors and bad sectors?
- A sfc
- B chkdsk ✓
- C ipconfig
- D tasklist
Answer: chkdsk scans the file system and disk for errors and can repair them with switches like /f and /r.
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Which command displays and manages a Windows machine's IP configuration?
- A ping
- B ipconfig ✓
- C netstat
- D tracert
Answer: ipconfig displays IP configuration; /release, /renew, and /flushdns manage it.
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Which command tests connectivity to a remote host by sending ICMP echo requests?
- A ping ✓
- B ipconfig
- C sfc
- D robocopy
Answer: ping sends ICMP echo requests to test reachability and measure latency to a host.
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Which command traces the path packets take to a destination?
- A ping
- B tracert ✓
- C nslookup
- D chkdsk
Answer: tracert (traceroute) shows each hop between the source and destination.
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Which command queries DNS to resolve names to IP addresses for troubleshooting?
- A nslookup ✓
- B netstat
- C sfc
- D diskpart
Answer: nslookup queries DNS servers to resolve and troubleshoot name resolution.