Top 20 Computer Hardware Multiple Choice Questions and Answers 2025 (Hardware MCQ Set-2)

Computer Hardware MCQs (Set of 20) – Set 2

Below are 20 important hardware multiple choice questions with answers. Useful for competitive exams, IT tests, and interview preparation.

1. Which component is responsible for cooling the CPU?

A. Thermal Paste
B. Heat Sink ✔
C. PSU
D. Chassis Fan

2. Which device is used to input handwritten text?

A. Joystick
B. Scanner
C. Graphics Tablet ✔
D. Stylus Pen

3. What type of memory is cache memory?

A. Secondary Memory
B. Non-Volatile Memory
C. High-speed volatile memory ✔
D. Optical Memory

4. Which connector is commonly used for network cables?

A. HDMI
B. PS/2
C. RJ45 ✔
D. AV Port

5. Which device converts AC to DC for computer use?

A. UPS
B. SMPS ✔
C. CPU
D. RAM

6. Which memory is faster?

A. RAM
B. Cache Memory ✔
C. Hard Disk
D. SSD

7. Which expansion slot is used for sound cards?

A. AGP
B. PCI ✔
C. SATA
D. IDE

8. Which device reads barcodes?

A. OCR
B. Barcode Scanner ✔
C. Magnetic Reader
D. Light Pen

9. What is the main function of the CMOS battery?

A. Power CPU
B. Supply power to RAM
C. Maintain system date and BIOS settings ✔
D. Boost graphics performance

10. Which device is used to display computer output?

A. Keyboard
B. Mouse
C. Monitor ✔
D. Scanner

11. Which storage device has no moving parts?

A. HDD
B. SSD ✔
C. DVD
D. Tape Drive

12. Which bus is used to connect external devices?

A. AGP
B. USB ✔
C. FSB
D. PS/2

13. Which device provides wireless connectivity?

A. Hub
B. Wi-Fi Adapter ✔
C. Keyboard
D. Switch

14. Which storage device is optical?

A. SSD
B. CD/DVD ✔
C. Flash Drive
D. Hard Disk

15. Which device is used to project screen output?

A. Monitor
B. Scanner
C. Projector ✔
D. Speaker

16. The full form of IRQ is:

A. Internal Request Query
B. Interrupt Request ✔
C. Interface Request
D. Integrated Response Queue

17. Which device is used to read MICR codes?

A. Scanner
B. MICR Reader ✔
C. OMR Device
D. Barcode Reader

18. What is the primary function of the CPU?

A. Storage
B. Processing ✔
C. Input
D. Printing

19. Which port is used for audio output?

A. VGA
B. 3.5 mm Audio Jack ✔
C. USB
D. HDMI

20. Which hardware component acts as the main circuit board?

A. RAM
B. CPU
C. Motherboard ✔
D. PSU