Q1. The brain of the computer is called:

A) Monitor
B) Keyboard
C) CPU
D) Printer

Answer: C) CPU
Explanation:

CPU (Central Processing Unit) performs calculations and controls all computer operations, so it is called the brain of the computer.

Q2. Which device is used to display output?

A) Keyboard
B) Mouse
C) Monitor
D) Scanner

Answer: C) Monitor
Explanation:

Monitor is an output device that displays text, images, and videos.

Q3. Which memory is permanent?

A) RAM
B) ROM
C) Cache
D) Register

Answer: B) ROM
Explanation:

ROM stores permanent instructions and does not lose data after power is turned off.

Q4. Which of the following is an input device?

A) Printer
B) Speaker
C) Keyboard
D) Monitor

Answer: C) Keyboard
Explanation:

Keyboard is used to enter data into the computer.

Q5. Full form of BIOS is:

A) Basic Input Output System
B) Binary Input Output System
C) Basic Internal Operating System
D) Boot Input Operating System

Answer: A) Basic Input Output System
Explanation:

BIOS helps start the computer and checks hardware during booting.

Q6. Which component stores data permanently?

A) RAM
B) Hard Disk
C) Cache
D) Register

Answer: B) Hard Disk
Explanation:

Hard Disk stores files permanently even after shutdown.

Q7. Which part connects all components of the computer?

A) CPU
B) RAM
C) Motherboard
D) Monitor

Answer: C) Motherboard
Explanation:

Motherboard is the main circuit board connecting all hardware parts.

Q8. Linux is a:

A) Hardware
B) Operating System
C) Browser
D) Antivirus

Answer: B) Operating System
Explanation:

Linux is an open-source operating system.

Q9. Which command is used to list files in Linux?

A) list
B) ls
C) show
D) dir

Answer: B) ls
Explanation:

The “ls” command shows files and folders in Linux.

Q10. Which power supply unit is used in PC?

A) UPS
B) SMPS
C) CPU
D) BIOS

Answer: B) SMPS
Explanation:

SMPS supplies power to internal computer components.

Q11. RAM stands for:

A) Read Access Memory
B) Random Access Memory
C) Run Access Memory
D) Ready Access Memory

Answer: B) Random Access Memory
Explanation:

RAM temporarily stores data for quick access while working.

Q12. Which device is used to print documents?

A) Scanner
B) Printer
C) Monitor
D) Mouse

Answer: B) Printer
Explanation:

Printer is an output device used to print documents on paper.

Q13. Which device is used to scan documents?

A) Printer
B) Scanner
C) Speaker
D) Monitor

Answer: B) Scanner
Explanation:

Scanner converts physical documents into digital form.

Q14. Which memory is volatile?

A) ROM
B) Hard Disk
C) RAM
D) DVD

Answer: C) RAM
Explanation:

RAM loses data when power is turned off.

Q15. Which port is commonly used for keyboard?

A) HDMI
B) USB
C) VGA
D) LAN

Answer: B) USB
Explanation:

Modern keyboards usually connect using USB ports.

Q16. What does CPU process?

A) Only images
B) Data and instructions
C) Only audio
D) Only internet

Answer: B) Data and instructions
Explanation:

CPU processes all data and instructions given by the user.

Q17. Which storage device is faster?

A) HDD
B) SSD
C) CD
D) DVD

Answer: B) SSD
Explanation:

SSD works faster than HDD because it has no moving parts.

Q18. Which key is used to refresh in Linux terminal history?

A) F1
B) Up Arrow
C) Enter
D) Tab

Answer: B) Up Arrow
Explanation:

Up Arrow helps access previous commands in terminal.

Q19. Which Linux command is used to create a directory?

A) mkdir
B) rmdir
C) ls
D) cd

Answer: A) mkdir
Explanation:

mkdir command creates a new directory.

Q20. Which Linux command is used to remove directory?

A) mkdir
B) rmdir
C) delete
D) remove

Answer: B) rmdir
Explanation:

rmdir removes an empty directory.

Q21. Which device controls cursor movement?

A) Keyboard
B) Mouse
C) Monitor
D) Printer

Answer: B) Mouse
Explanation:

Mouse helps move the cursor and select items.

Q22. What is the full form of HDD?

A) Hard Disk Drive
B) High Data Drive
C) Heavy Disk Drive
D) Hard Data Device

Answer: A) Hard Disk Drive
Explanation:

HDD is used for permanent data storage.

Q23. Which software starts first when computer boots?

A) MS Word
B) BIOS
C) Browser
D) Excel

Answer: B) BIOS
Explanation:

BIOS checks hardware and starts the boot process.

Q24. Which memory is fastest?

A) Hard Disk
B) RAM
C) Cache
D) DVD

Answer: C) Cache
Explanation:

Cache memory is very fast and helps CPU access data quickly.

Q25. Which Linux command changes directory?

A) ls
B) cd
C) pwd
D) mkdir

Answer: B) cd
Explanation:

cd command is used to change the current directory.

Q26. Which Linux command shows current directory path?

A) pwd
B) path
C) dir
D) show

Answer: A) pwd
Explanation:

pwd means Present Working Directory.

Q27. Which command clears terminal screen?

A) remove
B) clear
C) clean
D) cls

Answer: B) clear
Explanation:

clear command removes previous output from terminal screen.

Q28. Which device provides backup power?

A) SMPS
B) UPS
C) CPU
D) RAM

Answer: B) UPS
Explanation:

UPS provides temporary backup power during electricity failure.

Q29. Which unit performs arithmetic operations?

A) ALU
B) CU
C) RAM
D) HDD

Answer: A) ALU
Explanation:

ALU (Arithmetic Logic Unit) performs calculations and logical operations.

Q30. Which unit controls all operations of CPU?

A) CU
B) ALU
C) ROM
D) RAM

Answer: A) CU
Explanation:

CU (Control Unit) manages and controls all CPU activities.