CPU Structure and Functions MCQs
CPU Structure and Functions MCQs
CBSE Class 9 – Computer Science
Class: 9 | Subject: Computer Science | Section: Computer Hardware | Topic: CPU Structure and Functions | 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 detailed explanations for clear concept understanding.
1. CPU stands for:
Answer: b) Central Processing Unit
Explanation: CPU is the main processing component that executes instructions and controls operations.
Explanation: CPU is the main processing component that executes instructions and controls operations.
2. CPU is known as the ______ of the computer.
Answer: b) Brain
Explanation: CPU controls all processing and decision‑making operations.
Explanation: CPU controls all processing and decision‑making operations.
3. Which unit performs calculations?
Answer: b) ALU
Explanation: Arithmetic Logic Unit performs arithmetic and logical operations.
Explanation: Arithmetic Logic Unit performs arithmetic and logical operations.
4. CU stands for:
Answer: a) Control Unit
Explanation: CU manages and coordinates all hardware activities.
Explanation: CU manages and coordinates all hardware activities.
5. ALU performs:
Answer: b) Calculations
Explanation: It handles arithmetic and comparison operations.
Explanation: It handles arithmetic and comparison operations.
6. Which unit controls instruction execution?
Answer: b) CU
Explanation: CU directs the flow of data and instructions.
Explanation: CU directs the flow of data and instructions.
7. Registers are located in:
Answer: b) CPU
Explanation: Registers are high‑speed storage areas inside CPU.
Explanation: Registers are high‑speed storage areas inside CPU.
8. Which is the fastest memory in CPU?
Answer: b) Register
Explanation: Registers operate at CPU speed.
Explanation: Registers operate at CPU speed.
9. CPU processes data in:
Answer: a) Binary form
Explanation: All computer processing uses 0s and 1s.
Explanation: All computer processing uses 0s and 1s.
10. CPU is mounted on:
Answer: b) Motherboard
Explanation: CPU is installed on the motherboard socket.
Explanation: CPU is installed on the motherboard socket.
11. CU sends signals to:
Answer: c) All components
Explanation: CU coordinates entire system.
Explanation: CU coordinates entire system.
12. ALU compares:
Answer: c) Both
Explanation: Logical operations include comparisons.
Explanation: Logical operations include comparisons.
13. CPU speed is measured in:
Answer: b) Hertz
Explanation: Indicates processing cycles per second.
Explanation: Indicates processing cycles per second.
14. Fetch‑Decode‑Execute cycle occurs in:
Answer: b) CPU
Explanation: CPU processes instructions through this cycle.
Explanation: CPU processes instructions through this cycle.
15. Temporary CPU storage:
Answer: a) Register
Explanation: Registers store immediate data.
Explanation: Registers store immediate data.
16. Logical operations include:
Answer: b) Comparison
Explanation: ALU performs logical comparisons.
Explanation: ALU performs logical comparisons.
17. CPU communicates via:
Answer: a) Buses
Explanation: Data, address, and control buses carry signals.
Explanation: Data, address, and control buses carry signals.
18. Which part directs operations?
Answer: b) CU
Explanation: CU supervises instruction flow.
Explanation: CU supervises instruction flow.
19. CPU works with:
Answer: c) Both
Explanation: CPU executes software instructions using hardware.
Explanation: CPU executes software instructions using hardware.
20. Main function of CPU:
Answer: b) Process instructions
Explanation: CPU interprets and executes program instructions.
Explanation: CPU interprets and executes program instructions.
