This set provides brand-new computer hardware MCQs helpful for competitive exams, IT interviews, and technical practice. Correct answers are highlighted in green with a green check mark for quick identification.
1. Which device is used to convert AC power to DC inside the computer?
A. CPU
B. RAM
C. SMPS ✔
D. GPU
2. Which memory type is used to store frequently accessed data for faster processing?
A. ROM
B. Cache Memory ✔
C. SSD
D. USB Drive
3. Which unit holds data currently being processed by the CPU?
A. Hard Disk
B. RAM ✔
C. CMOS
D. Router
4. Which connector is used to power older IDE hard drives?
A. SATA Power
B. Molex Connector ✔
C. USB Type B
D. PCIe Connector
5. Which device is used to input printed images into a computer?
A. Printer
B. Scanner ✔
C. Webcam
D. Barcode Reader
6. Which motherboard component stores system time and date?
A. RAM
B. CMOS ✔
C. NIC
D. PCI Slot
7. What is the function of a heat sink?
A. Store data
B. Dissipate heat ✔
C. Increase clock speed
D. Power distribution
8. Which type of port is used for connecting external displays?
A. RJ-11
B. HDMI ✔
C. PS/2
D. Serial Port
9. Which storage technology uses laser light for reading data?
A. HDD
B. RAM
C. Optical Disc ✔
D. SSD
10. Which device is primarily used to strengthen weak signals in a network?
A. Modem
B. Repeater ✔
C. Switch
D. Hub
11. Which slot is used for high-performance graphics cards?
A. AGP
B. PCI Express (PCIe) ✔
C. PCI
D. ISA
12. Which component ensures stable system voltage regulation?
A. GPU
B. VRM ✔
C. DVD-ROM
D. Heat Sink
13. What technology allows multiple hard drives to work together for redundancy?
A. SATA
B. RAID ✔
C. USB
D. HDMI
14. Which memory module type is commonly used in laptops?
A. DIMM
B. SO-DIMM ✔
C. DDR1
D. SSD
15. Which device is responsible for rendering 3D images and videos?
A. CPU
B. RAM
C. GPU ✔
D. NIC
16. What type of drive is used to read and write Blu-ray discs?
A. DVD Drive
B. BD-ROM Drive ✔
C. SSD
D. Tape Drive
17. Which port is best for high-speed data transfer on modern devices?
A. USB 2.0
B. VGA
C. USB Type-C ✔
D. PS/2
18. Which device provides wireless internet connectivity?
A. Switch
B. Wi-Fi Router ✔
C. Hard Disk
D. Keyboard
19. What does the Control Unit (CU) do?
A. Perform calculations
B. Direct CPU operations ✔
C. Store data permanently
D. Print documents
20. Which type of printer produces carbon-copy printouts?
A. Inkjet
B. Laser
C. Dot Matrix ✔
D. Thermal
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