Top 20 Computer Hardware Multiple Choice Questions and Answers 2025 (Hardware MCQ Set-4)

This Hardware MCQ Set 4 includes a new collection of high-quality computer hardware multiple-choice questions designed for exams, interviews, and IT skills assessment. Each question features four options with correctly highlighted answers for quick revision and effective learning.

1. Which part acts as the brain of the computer?
A. GPU
B. RAM
C. CPU ✔
D. SSD

2. Which connector is used for modern keyboards?
A. PS/2
B. Serial Port
C. USB ✔
D. Parallel Port

3. Which device is used to read barcodes?
A. Joystick
B. Barcode Scanner ✔
C. Web Camera
D. MICR

4. Which memory stores data permanently?
A. RAM
B. Cache
C. ROM ✔
D. Registers

5. What is the function of the heat sink?
A. Store Data
B. Boost Graphics
C. Cool the CPU ✔
D. Connect Devices

6. Which port is used for high-speed external storage?
A. PS/2
B. VGA
C. USB 3.0 ✔
D. Audio Jack

7. Which device is used to take backup of data?
A. Printer
B. Plotter
C. External Hard Drive ✔
D. Scanner

8. Which expansion slot is used for sound cards?
A. AGP
B. PCIe x16
C. PCI ✔
D. USB Slot

9. Which of the following is NOT an input device?
A. Touchpad
B. Mouse
C. Projector ✔
D. Keyboard

10. A typical laptop uses which type of RAM?
A. DDR2
B. SO-DIMM ✔
C. SDRAM
D. SRAM

11. Which protocol is used for wireless keyboard and mouse?
A. HDMI
B. VGA
C. Bluetooth ✔
D. FTP

12. Which component holds the boot loader?
A. GPU
B. BIOS ✔
C. RAM
D. Hard Drive

13. Which part of the computer generates sound?
A. NIC Card
B. CPU
C. Sound Card ✔
D. Modem

14. Which device is used to protect the computer from voltage fluctuations?
A. Hard Disk
B. Router
C. Stabilizer ✔
D. Scanner

15. Which connector is used for wired internet?
A. USB
B. HDMI
C. RJ-45 ✔
D. RJ-11

16. A mouse that detects motion with light uses which technology?
A. Mechanical
B. Ball Sensor
C. Optical ✔
D. Infrared Sensor

17. Which device converts AC to DC?
A. Adapter
B. UPS
C. SMPS ✔
D. Cooling Fan

18. Which hardware is essential for starting a computer?
A. Printer
B. Speakers
C. Power Supply Unit ✔
D. Scanner

19. Which type of cable is commonly used for monitors?
A. PS/2
B. Serial
C. HDMI ✔
D. RJ-11

20. Where is the operating system primarily loaded during startup?
A. GPU
B. SSD only
C. RAM ✔
D. Cache