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Wednesday, December 3, 2025

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PC TECHNICIAN QUESTIONS AND ANSWERS

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A. Computer Hardware (1–25)

  1. Which component is considered the “brain” of the computer?
    A. GPU
    B. CPU
    C. RAM
    D. SSD
    Answer: B

  2. Which device is used to store the computer’s BIOS settings?
    A. ROM
    B. CMOS battery
    C. HDD
    D. PSU
    Answer: B

  3. Which connector is used for modern internal hard drives?
    A. IDE
    B. SATA
    C. SCSI
    D. Parallel
    Answer: B

  4. RAM stands for:
    A. Random Access Memory
    B. Ready Active Memory
    C. Rapid Access Module
    D. Read Active Memory
    Answer: A

  5. Which slot is commonly used for graphics cards?
    A. PCI
    B. AGP
    C. PCIe x16
    D. ISA
    Answer: C

  6. A CPU cooler is used to:
    A. Increase performance
    B. Prevent overheating
    C. Clean dust
    D. Increase power
    Answer: B

  7. Which form factor is commonly used in desktop motherboards?
    A. ATX
    B. BTX
    C. NTX
    D. ITX
    Answer: A

  8. Which voltage is used by SATA power connectors?
    A. 12V, 5V, 3.3V
    B. 9V only
    C. 24V only
    D. 6V only
    Answer: A

  9. Which component stores temporary data while the computer is running?
    A. HDD
    B. RAM
    C. SSD
    D. NIC
    Answer: B

  10. SSD stands for:
    A. Solid State Drive
    B. Super Storage Disk
    C. Static Storage Device
    D. Secure System Drive
    Answer: A

  11. A Dual-Core processor has:
    A. 1 core
    B. 2 cores
    C. 4 cores
    D. 8 cores
    Answer: B

  12. Thermal paste is applied between:
    A. RAM and motherboard
    B. CPU and heatsink
    C. GPU and PSU
    D. HDD and case
    Answer: B

  13. Which device converts AC to DC power?
    A. GPU
    B. HDD
    C. PSU
    D. CPU
    Answer: C

  14. POST stands for:
    A. Power On Self Test
    B. Program Output System Test
    C. Primary Operating System Task
    D. Power Output Standard Test
    Answer: A

  15. Which port is used for older keyboards?
    A. USB
    B. PS/2
    C. HDMI
    D. VGA
    Answer: B

  16. Which connector is used for monitors?
    A. HDMI
    B. VGA
    C. DisplayPort
    D. All of the above
    Answer: D

  17. ECC RAM is used for:
    A. Gaming PCs
    B. Error correction
    C. Increasing heat
    D. Wireless connectivity
    Answer: B

  18. CPU speed is measured in:
    A. GHz
    B. MB
    C. Volts
    D. RPM
    Answer: A

  19. Which storage has no moving parts?
    A. HDD
    B. SSD
    C. Floppy disk
    D. CD-ROM
    Answer: B

  20. A GPU is responsible for:
    A. Power supply
    B. Network control
    C. Graphics rendering
    D. Memory management
    Answer: C

  21. Which cable is used for Ethernet?
    A. CAT6
    B. HDMI
    C. RCA
    D. USB
    Answer: A

  22. A motherboard chipset controls:
    A. Power input
    B. Data flow between CPU and components
    C. Sound quality
    D. Cooling system
    Answer: B

  23. Which type of memory is permanent?
    A. RAM
    B. Cache
    C. ROM
    D. Registers
    Answer: C

  24. HDDs are measured in:
    A. GHz
    B. RPM
    C. MBps
    D. kWh
    Answer: B

  25. Which pin count is used for DDR4 desktop RAM?
    A. 184
    B. 200
    C. 240
    D. 288
    Answer: D

B. Operating Systems (26–45)

  1. Windows system files usually have extension:
    A. .exe
    B. .dll
    C. .sys
    D. All of the above
    Answer: D

  2. Which key opens Task Manager quickly?
    A. Ctrl + S
    B. Ctrl + Alt + Del
    C. Alt + F4
    D. Win + R
    Answer: B

  3. Which OS is open-source?
    A. Windows
    B. macOS
    C. Linux
    D. ChromeOS
    Answer: C

  4. What does GUI stand for?
    A. General User Interaction
    B. Graphical User Interface
    C. Global User Internet
    D. Graphic Utility Item
    Answer: B

  5. Device drivers are used to:
    A. Connect hardware to the OS
    B. Update internet
    C. Remove viruses
    D. Boot faster
    Answer: A

  6. Windows command to check disk errors is:
    A. ipconfig
    B. chkdsk
    C. ping
    D. format
    Answer: B

  7. Which Windows feature restores system settings?
    A. Disk Cleanup
    B. Update Manager
    C. System Restore
    D. Task Scheduler
    Answer: C

  8. Which file system is best for Windows?
    A. NTFS
    B. FAT16
    C. EXT3
    D. HFS+
    Answer: A

  9. Safe Mode loads Windows with:
    A. All drivers
    B. Minimum drivers
    C. High performance settings
    D. Overclock settings
    Answer: B

  10. The Windows Run command shortcut:
    A. Win + R
    B. Win + X
    C. Win + S
    D. Win + Tab
    Answer: A

  11. Which tool shows system performance?
    A. Control Panel
    B. Device Manager
    C. Task Manager
    D. Notepad
    Answer: C

  12. Linux command to list files:
    A. copy
    B. ls
    C. cmd
    D. mkdir
    Answer: B

  13. The Windows registry stores:
    A. Hardware settings
    B. Software settings
    C. User preferences
    D. All of the above
    Answer: D

  14. Which OS update type includes security fixes only?
    A. Feature update
    B. Major update
    C. Patch
    D. Driver update
    Answer: C

  15. Which folder stores 64-bit applications in Windows?
    A. Program Files
    B. Program Files (x86)
    C. System32
    D. SysWOW64
    Answer: A

  16. The BIOS loads the OS by reading the:
    A. RAM
    B. Bootloader
    C. GPU
    D. USB port
    Answer: B

  17. Linux command to restart:
    A. restart now
    B. reboot
    C. shutdown /f
    D. refresh
    Answer: B

  18. Windows command to view IP address:
    A. ipconfig
    B. winip
    C. wmic
    D. ifconfig
    Answer: A

  19. Defragmentation is useful for:
    A. SSD
    B. HDD
    C. CMOS
    D. RAM
    Answer: B

  20. Which tool removes malware in Windows?
    A. Task Manager
    B. Windows Defender
    C. Disk Backup
    D. BIOS
    Answer: B

C. Networking (46–70)

  1. LAN stands for:
    A. Local Access Network
    B. Local Area Network
    C. Large Area Network
    D. Link Access Node
    Answer: B

  2. Common Wi-Fi standard:
    A. 802.11
    B. 909.11
    C. 505.20
    D. 702.10
    Answer: A

  3. What device connects multiple networks?
    A. Router
    B. Switch
    C. Hub
    D. Repeater
    Answer: A

  4. A switch works at which OSI layer?
    A. Layer 1
    B. Layer 2
    C. Layer 5
    D. Layer 7
    Answer: B

  5. IPv4 length:
    A. 16 bit
    B. 32 bit
    C. 64 bit
    D. 128 bit
    Answer: B

  6. Which command tests network connectivity?
    A. ipconfig
    B. ping
    C. netstat
    D. tracert
    Answer: B

  7. Which device broadcasts all traffic?
    A. Router
    B. Switch
    C. Hub
    D. Firewall
    Answer: C

  8. Default gateway refers to:
    A. Local router address
    B. MAC address
    C. DNS server
    D. IP lease
    Answer: A

  9. DNS translates:
    A. IP → URL
    B. URL → IP
    C. MAC → IP
    D. IP → Hostname only
    Answer: B

  10. Wi-Fi security type:
    A. WPA2
    B. HTTP
    C. FTP
    D. QRX
    Answer: A

  11. Subnet mask of a typical home network:
    A. 255.0.0.0
    B. 255.255.255.0
    C. 255.255.0.0
    D. 255.255.255.255
    Answer: B

  12. MAC address is:
    A. 32 bits
    B. 48 bits
    C. 64 bits
    D. 128 bits
    Answer: B

  13. Which command shows active connections?
    A. ping
    B. netstat
    C. gpupdate
    D. cls
    Answer: B

  14. CAT6 max speed:
    A. 100 Mbps
    B. 1 Gbps
    C. 10 Gbps
    D. 40 Gbps
    Answer: C

  15. Port for HTTP:
    A. 25
    B. 443
    C. 80
    D. 21
    Answer: C

  16. Port for FTP:
    A. 21
    B. 53
    C. 110
    D. 443
    Answer: A

  17. Port for DNS:
    A. 25
    B. 53
    C. 110
    D. 23
    Answer: B

  18. A repeater is used to:
    A. Filter malware
    B. Extend network signal
    C. Increase power supply
    D. Block websites
    Answer: B

  19. Firewall function:
    A. Video rendering
    B. Blocks unauthorized traffic
    C. Cleans RAM
    D. Formats HDD
    Answer: B

  20. Common wireless frequency:
    A. 1 GHz
    B. 2.4 GHz
    C. 10 GHz
    D. 0.5 GHz
    Answer: B

  21. Network topology with a central hub:
    A. Ring
    B. Mesh
    C. Star
    D. Bus
    Answer: C

  22. VPN is used for:
    A. Gaming
    B. Secure remote access
    C. Cooling
    D. Disk repair
    Answer: B

  23. Loopback IP:
    A. 192.168.0.1
    B. 10.0.0.1
    C. 8.8.8.8
    D. 127.0.0.1
    Answer: D

  24. Which tool checks path to a destination?
    A. ping
    B. tracert
    C. ls
    D. scanpath
    Answer: B

  25. RJ45 connector is used for:
    A. Power
    B. Keyboard
    C. Ethernet
    D. USB
    Answer: C

D. Troubleshooting & Safety (71–100)

  1. Which tool removes dust from a PC?
    A. Water
    B. Blower/compressed air
    C. Oil
    D. Paintbrush
    Answer: B

  2. ESD stands for:
    A. Electronic Storage Data
    B. Electrostatic Discharge
    C. Emergency System Device
    D. Electrical System Detector
    Answer: B

  3. Best surface to place a motherboard during repair:
    A. Metallic table
    B. Carpet
    C. Wood or non-conductive surface
    D. Wet cloth
    Answer: C

  4. PC beeps during startup indicates:
    A. Successful boot
    B. Hardware error
    C. Virus
    D. Low battery only
    Answer: B

  5. If PC does not power on, first check:
    A. GPU
    B. RAM
    C. Power cable & PSU
    D. Mouse
    Answer: C

  6. Overheating is commonly caused by:
    A. Too much RAM
    B. Bad cooling system
    C. Fast internet
    D. Keyboard error
    Answer: B

  7. Blue screen errors in Windows are called:
    A. BSA
    B. BSOD
    C. BSOS
    D. WSE
    Answer: B

  8. If no display appears, check:
    A. Monitor power
    B. GPU connection
    C. RAM
    D. All of the above
    Answer: D

  9. Which tool tests RAM?
    A. MemTest
    B. DiskPart
    C. WinZip
    D. BIOS updater
    Answer: A

  10. If computer auto-restarts, likely cause:
    A. Bad PSU
    B. Malware
    C. Overheating
    D. All of the above
    Answer: D

  11. CMOS battery type:
    A. AAA
    B. CR2032
    C. 9V
    D. AA
    Answer: B

  12. If hard drive not detected:
    A. Check SATA cable
    B. Check BIOS
    C. Check power connection
    D. All of the above
    Answer: D

  13. Which tool tests the PSU?
    A. Multimeter
    B. Screwdriver
    C. Flashlight
    D. HDMI cable
    Answer: A

  14. Which key enters BIOS?
    A. F1
    B. F2
    C. DEL
    D. Any of the above depending on PC
    Answer: D

  15. System freezing can be caused by:
    A. Bad RAM
    B. Overheating
    C. Malware
    D. All of the above
    Answer: D

  16. S.M.A.R.T. is related to:
    A. RAM
    B. HDD health
    C. GPU
    D. CPU temperature
    Answer: B

  17. If PC makes grinding noise:
    A. HDD failure
    B. GPU fan
    C. Case fan
    D. All possible
    Answer: D

  18. If keyboard not responding:
    A. Check USB port
    B. Test with another PC
    C. Replace keyboard
    D. All of the above
    Answer: D

  19. Which antivirus is built into Windows?
    A. Kaspersky
    B. Avast
    C. Windows Defender
    D. Bitdefender
    Answer: C

  20. To remove stubborn malware use:
    A. Windows Firewall
    B. System Restore
    C. Safe Mode + antivirus
    D. Notepad
    Answer: C

  21. SMART errors suggest:
    A. RAM failure
    B. HDD nearing failure
    C. Screen issue
    D. GPU crash
    Answer: B

  22. Unexpected shutdowns may be caused by:
    A. Overheating
    B. PSU failure
    C. Motherboard failure
    D. All of the above
    Answer: D

  23. To install OS from USB you must:
    A. Format USB
    B. Make it bootable
    C. Change boot priority
    D. All of the above
    Answer: D

  24. A burning smell inside PC indicates:
    A. Software error
    B. Hardware damage
    C. Browser problem
    D. Driver issue
    Answer: B

  25. If system time resets every boot:
    A. Virus
    B. CMOS battery dead
    C. PSU failure
    D. GPU problem
    Answer: B

  26. STOP error in Windows refers to:
    A. Slow PC
    B. BSOD
    C. Safe Mode
    D. Low memory
    Answer: B

  27. Tool to check memory usage:
    A. WinZip
    B. Task Manager
    C. Notepad
    D. CMD only
    Answer: B

  28. Which command repairs Windows boot files?
    A. bootrec /fixmbr
    B. ipconfig
    C. net stop
    D. cmdrepair
    Answer: A

  29. If PC powers but no display, try:
    A. Reseat RAM
    B. Reseat GPU
    C. Clear CMOS
    D. All of the above
    Answer: D

  30. Best practice after assembling a PC:
    A. Power it on immediately
    B. Check all connections first
    C. Install games first
    D. Shake the case
    Answer: B




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