Computer troubleshooting questions and answers
Diagnose common slowdowns, internet issues, boot failures and peripherals safely.
These are practice variations, many generated from templates and numeric inputs, not an official question bank. They remain outside search indexing until at least 100 independently reviewed questions across five chapters are available.
Questions and clear answers
01Performance · foundation · Editorial previewWhat should you check first when a computer is slow?+
Check CPU, RAM and disk activity as well as recently installed software before changing settings.
02Display · foundation · Editorial previewWhat should you check when a monitor stays black?+
Check power, selected input, cable connections and another known-good display or cable if available.
03Diagnosis · foundation · Editorial previewWhy record the exact error message?+
The wording and code can identify the component failing and help prevent unrelated troubleshooting.
04Safety · foundation · Editorial previewWhy back up files before major repairs?+
Recovery and reinstall procedures can erase data, so an independent verified backup reduces risk.
05Slow computers · advanced · Editorial previewIn troubleshooting — Slow computers: A computer shows error code ERR-1892. What information should be recorded before troubleshooting?+
Capture the exact code ERR-1892, the operation being performed, timing, device and recent changes. Do not diagnose solely from an invented code.
06Network connection · foundation · Editorial previewIn troubleshooting — Network connection: Computer model Test-2691 cannot open a site while another device works on Wi-Fi network 22. Is a factory router reset the appropriate first step?+
No. Check the failing device's connection, DNS and browser before taking disruptive router-reset actions.
07Storage problems · foundation · Editorial previewIn troubleshooting — Storage problems: A storage problems activity has 3490 files using 6 MB each and 10 MB of extra files. Find total storage.+
Total = 3490 × 6 + 10 = 20950 MB, before filesystem overhead.
08Memory limits · intermediate · Editorial previewIn troubleshooting — Memory limits: A device has 4289 MB free memory. Two tasks use 13 MB and 17 MB. How much free memory remains?+
Remaining free memory = 4289 − 13 − 17 = 4259 MB, assuming no other changes.
09Boot errors · foundation · Editorial previewIn troubleshooting — Boot errors: A 89 GB drive contains irreplaceable files. What must be done before repartitioning for OS installation?+
Back up and verify the files independently. Partition changes and installation can erase existing data.
10Monitor issues · advanced · Editorial previewIn troubleshooting — Monitor issues: A monitor labeled Demo-888 stays blank when connected to a laptop on HDMI input 4. What should the user check safely first?+
Verify Demo-888 has power and is set to HDMI 4, then check cable seating and operating-system display settings.
11Peripheral issues · intermediate · Editorial previewIn troubleshooting — Peripheral issues: A computer is connected to 11 keyboards and 4 monitors. Which are input devices?+
The 11 keyboards are input devices; the 4 monitors are output displays.
12Backups · foundation · Editorial previewIn troubleshooting — Backups: A backup plan covers 2486 GB and a verified copy stores 18 GB. How much has not yet been copied?+
Uncopied amount = 2486 − 18 = 2468 GB (assuming the same units and no duplicate data).
13System updates · foundation · Editorial previewIn troubleshooting — System updates: A system offers security update KB-3285. Should a user disable updates permanently to avoid restarts?+
No. Plan a safe update and restart window, maintain backups, and check official release details if compatibility is a concern.
14Driver issues · intermediate · Editorial previewIn troubleshooting — Driver issues: A newly installed peripheral model Example-4084 is not recognized. Where should a compatible driver come from?+
Use the operating system's supported update method or the hardware manufacturer's official support page for the exact model.
15Battery health · advanced · Editorial previewIn troubleshooting — Battery health: A device starts at 43% charge, consumes 16 percentage points/hour, and is used for 15 minutes. What percentage is left under a linear model?+
Battery remaining = max(0, 43 − 16 × 15/60) ≈ 39% (approximate linear assumption).
16Malware safety · foundation · Editorial previewIn troubleshooting — Malware safety: An email asks the owner of device 683 to install a 'security fix' from an unknown link. What should they do?+
Do not install it. Verify updates through the official vendor or operating system, and independently check the sender and domain.
17Slow computers · intermediate · Editorial previewIn troubleshooting — Slow computers: A computer shows error code ERR-1482. What information should be recorded before troubleshooting?+
Capture the exact code ERR-1482, the operation being performed, timing, device and recent changes. Do not diagnose solely from an invented code.
18Network connection · foundation · Editorial previewIn troubleshooting — Network connection: Computer model Test-2281 cannot open a site while another device works on Wi-Fi network 14. Is a factory router reset the appropriate first step?+
No. Check the failing device's connection, DNS and browser before taking disruptive router-reset actions.
This is an educational practice preview. Answers and board-specific alignment are undergoing editorial review; these are not official exam questions.