In today’s digital world, having a strong understanding of basic computer concepts is essential for students, professionals, and competitive exam aspirants. Whether you are preparing for exams like SSC, Banking, Railways, or simply want to improve your computer knowledge, practicing multiple-choice questions (MCQs) is one of the most effective ways to test and strengthen your understanding.
This quiz consists of 20 carefully selected questions covering fundamental topics such as computer basics, memory, input/output devices, operating systems, and data processing. Each question is designed not only to check your knowledge but also to challenge your concepts with tricky and exam-oriented options.
Attempt all the questions honestly and try to understand the explanations provided after each answer. This will help you identify your weak areas and improve accuracy in real exams.
Basic Computer Quiz Questions with Answers
Let’s test your computer knowledge and boost your preparation!
1. What is a computer?
A. A machine used only for typing documents.
B. An electronic device that processes data into information.
C. A device used only for internet browsing.
D. A machine that stores electricity.
Explanation:
A computer is an electronic device that accepts input, processes data according to instructions, and produces meaningful output (information). It is not limited to just typing or browsing—it performs many tasks like calculations, storage, communication, and automation.
A computer is an electronic device that accepts input, processes data according to instructions, and produces meaningful output (information). It is not limited to just typing or browsing—it performs many tasks like calculations, storage, communication, and automation.
2. Which component is known as the “brain” of the computer?
A. Memory Unit
B. Control Unit
C. Central Processing Unit (CPU)
D. Arithmetic Logic Unit (ALU)
Explanation:
The CPU is called the brain of the computer because it controls all operations of the computer. While the ALU performs calculations and the CU controls instructions, both are parts of the CPU.
The CPU is called the brain of the computer because it controls all operations of the computer. While the ALU performs calculations and the CU controls instructions, both are parts of the CPU.
3. Which of the following is volatile memory?
A. ROM
B. Hard Disk
C. RAM
D. CD-ROM
Explanation:
Volatile memory loses data when power is turned off. RAM temporarily stores data for active processes, unlike ROM or hard disks which retain data permanently.
Volatile memory loses data when power is turned off. RAM temporarily stores data for active processes, unlike ROM or hard disks which retain data permanently.
4. Which of the following is an example of system software?
A. MS Excel
B. Google Chrome
C. Adobe Photoshop
D. Windows Operating System
Explanation:
System software manages hardware and system operations. Windows is an operating system, while others are application software.
System software manages hardware and system operations. Windows is an operating system, while others are application software.
5. What is the primary function of an operating system?
A. To create documents
B. To browse the internet
C. To perform calculations
D. To manage hardware and software resources
Explanation:
The operating system acts as an interface between user and hardware, managing memory, processes, devices, and files.
The operating system acts as an interface between user and hardware, managing memory, processes, devices, and files.
6. Which device is used to convert hard copy into soft copy?
A. Scanner
B. Printer
C. Plotter
D. Monitor
Explanation:
A scanner captures physical documents and converts them into digital format, unlike printers which do the opposite.
A scanner captures physical documents and converts them into digital format, unlike printers which do the opposite.
7. Which of the following is not an input device?
A. Keyboard
B. Mouse
C. Monitor
D. Scanner
Explanation:
Monitor is an output device used to display information, while others are input devices.
Monitor is an output device used to display information, while others are input devices.
8. Which of the following is not a characteristic of a computer?
A. Speed
B. Accuracy
C. Automation
D. Intelligence
Explanation:
Computers have speed, accuracy, and automation, but they do not possess intelligence or decision-making ability. They only follow instructions given by users.
Computers have speed, accuracy, and automation, but they do not possess intelligence or decision-making ability. They only follow instructions given by users.
9. Which of the following memory types is both volatile and fastest?
A. RAM
B. Cache Memory
C. ROM
D. Hard Disk
Explanation:
Cache memory is faster than RAM and is volatile. It is located closer to the CPU and speeds up processing by storing frequently used data.
Cache memory is faster than RAM and is volatile. It is located closer to the CPU and speeds up processing by storing frequently used data.
10. Which of the following statements is TRUE about ROM?
A. It is volatile memory.
B. Data is lost when power is off.
C. It stores permanent instructions.
D. It is used for temporary storage.
Explanation:
ROM (Read Only Memory) is non-volatile and stores permanent instructions like booting programs.
ROM (Read Only Memory) is non-volatile and stores permanent instructions like booting programs.
11. What happens in the computer when the booting process starts?
A. Files are deleted.
B. Operating system is loaded into RAM.
C. Hardware is removed.
D. None of these
Explanation:
Booting is the process where the computer starts and loads the operating system into memory for operation.
Booting is the process where the computer starts and loads the operating system into memory for operation.
12. Which of the following devices can act as both an input and output device?
A. Touchscreen
B. Scanner
C. Printer
D. Monitor
Explanation:
Touchscreen accepts input (touch) and displays output (screen), making it both input and output device.
Touchscreen accepts input (touch) and displays output (screen), making it both input and output device.
13. Which of the following is an example of secondary storage?
A. RAM
B. Cache
C. Hard Disk
D. None of these
Explanation:
Secondary storage stores data permanently, unlike RAM or cache.
Secondary storage stores data permanently, unlike RAM or cache.
14. Which of the following is the smallest unit of data?
A. Bit
B. Byte
C. Nibble
D. Word
Explanation:
Bit (Binary Digit) is the smallest unit of data, representing 0 or 1.
Bit (Binary Digit) is the smallest unit of data, representing 0 or 1.
15. Which of the following is not an operating system?
A. Linux
B. Windows
C. macOS
D. MS Word
Explanation:
MS Word is application software, not an operating system.
MS Word is application software, not an operating system.
16. Which of the following is an example of firmware?
A. BIOS
B. MS Excel
C. Windows
D. Chrome
Explanation:
BIOS is firmware stored in ROM that helps start the computer.
BIOS is firmware stored in ROM that helps start the computer.
17. Which of the following component interprets instructions?
A. ALU
B. Control Unit
C. RAM
D. Cache
Explanation:
Control Unit fetches and interprets instructions.
Control Unit fetches and interprets instructions.
18. Which of the following is fastest storage?
A. Hard disk
B. ROM
C. SSD
D. Cache
Explanation:
Cache is fastest among all storage types.
Cache is fastest among all storage types.
19. Which is fastest among these?
A. Register
B. Cache
C. RAM
D. SSD
Explanation:
Register is fastest memory.
Register is fastest memory.
20. Which of the following devices gives soft copy output?
A. Printer
B. Scanner
C. Plotter
D. Monitor
Explanation:
Monitor gives the soft copy output.
Monitor gives the soft copy output.
Practice more here:
Computer Fundamentals MCQ Questions with Answers – A complete set of exam-oriented MCQs to improve your computer knowledge and boost your preparation.
