Computer Hardware Components MCQs Class 9
Computer Hardware Components MCQs
CBSE Class 9 – Computer Science
Class: 9 | Subject: Computer Science | Section: Computer Hardware | Topic: Computer Hardware Components | CBSE Board Examination
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 9 Computer Science examinations. Each question includes a detailed explanation to help students clearly understand the concept.
1. Which of the following is the brain of the computer?
Answer: b) CPU
Explanation: The Central Processing Unit (CPU) performs all calculations and processing tasks. It controls and manages the operations of all other hardware components, which is why it is called the brain of the computer.
Explanation: The Central Processing Unit (CPU) performs all calculations and processing tasks. It controls and manages the operations of all other hardware components, which is why it is called the brain of the computer.
2. Which hardware device is used to display output?
Answer: b) Monitor
Explanation: A monitor is a visual display unit that shows text, images, and videos generated by the computer. It is the most common output device.
Explanation: A monitor is a visual display unit that shows text, images, and videos generated by the computer. It is the most common output device.
3. Which of the following is an input device?
Answer: a) Keyboard
Explanation: A keyboard is used to enter data and instructions into the computer, making it an input device.
Explanation: A keyboard is used to enter data and instructions into the computer, making it an input device.
4. Which component stores data permanently?
Answer: b) ROM
Explanation: Read Only Memory (ROM) stores permanent instructions required to start the computer. Data in ROM is not lost when power is off.
Explanation: Read Only Memory (ROM) stores permanent instructions required to start the computer. Data in ROM is not lost when power is off.
5. Which memory is volatile?
Answer: c) RAM
Explanation: Random Access Memory (RAM) is volatile, meaning data is lost when power is turned off.
Explanation: Random Access Memory (RAM) is volatile, meaning data is lost when power is turned off.
6. The physical parts of a computer are called:
Answer: b) Hardware
Explanation: Hardware refers to all tangible components like keyboard, monitor, CPU, etc.
Explanation: Hardware refers to all tangible components like keyboard, monitor, CPU, etc.
7. Which device prints output on paper?
Answer: b) Printer
Explanation: Printers produce hard copy output on paper.
Explanation: Printers produce hard copy output on paper.
8. Which storage device has the largest capacity?
Answer: c) Hard Disk
Explanation: Hard disks store large amounts of data permanently.
Explanation: Hard disks store large amounts of data permanently.
9. CPU consists of:
Answer: a) ALU & CU
Explanation: Arithmetic Logic Unit performs calculations, Control Unit manages operations.
Explanation: Arithmetic Logic Unit performs calculations, Control Unit manages operations.
10. Which device is used to input images?
Answer: a) Scanner
Explanation: A scanner converts physical images/documents into digital form.
Explanation: A scanner converts physical images/documents into digital form.
11. Full form of CPU is:
Answer: b) Central Processing Unit
Explanation: CPU processes instructions and controls system functions.
Explanation: CPU processes instructions and controls system functions.
12. Which is NOT an output device?
Answer: d) Keyboard
Explanation: Keyboard is an input device.
Explanation: Keyboard is an input device.
13. Which device controls cursor movement?
Answer: b) Mouse
Explanation: Mouse is a pointing input device.
Explanation: Mouse is a pointing input device.
14. Example of secondary storage:
Answer: c) Hard Disk
Explanation: Secondary storage stores data permanently.
Explanation: Secondary storage stores data permanently.
15. Which memory is fastest?
Answer: c) Cache
Explanation: Cache memory provides very high-speed data access to CPU.
Explanation: Cache memory provides very high-speed data access to CPU.
16. Microphone is an:
Answer: a) Input device
Explanation: It inputs sound into the computer.
Explanation: It inputs sound into the computer.
17. Which unit performs calculations?
Answer: b) ALU
Explanation: Arithmetic Logic Unit handles arithmetic and logical operations.
Explanation: Arithmetic Logic Unit handles arithmetic and logical operations.
18. UPS stands for:
Answer: b) Uninterruptible Power Supply
Explanation: UPS provides backup power during outages.
Explanation: UPS provides backup power during outages.
19. Which device produces audio output?
Answer: a) Speaker
Explanation: Speakers convert digital signals into sound.
Explanation: Speakers convert digital signals into sound.
20. Motherboard is:
Answer: b) Main circuit board
Explanation: Motherboard connects and allows communication between all hardware components.
Explanation: Motherboard connects and allows communication between all hardware components.
