Uses of Binary Numbers in Computers MCQs
Uses of Binary Numbers in Computers – MCQs with Answers & Explanations
Class: CBSE Class 8 |
Subject: Computer Science |
Section: Number System |
Topic: Uses of Binary Numbers in Computers
Based on NCERT Syllabus | CBSE Board Examination Format
Based on NCERT Syllabus | CBSE Board Examination Format
1. Computers understand data in which number system?
Answer: c) Binary
Explanation: Computers use only two states (ON/OFF). These are represented as 1 and 0 in binary form.
Explanation: Computers use only two states (ON/OFF). These are represented as 1 and 0 in binary form.
2. Binary system is based on how many digits?
Answer: a) 2
Explanation: Binary uses only two digits: 0 and 1.
Explanation: Binary uses only two digits: 0 and 1.
3. A single binary digit is called:
Answer: b) Bit
Explanation: Bit stands for Binary Digit and is the smallest unit of data in a computer.
Explanation: Bit stands for Binary Digit and is the smallest unit of data in a computer.
4. 8 bits together form a:
Answer: a) Byte
Explanation: One byte consists of 8 bits and is commonly used to represent one character.
Explanation: One byte consists of 8 bits and is commonly used to represent one character.
5. Binary numbers are used in computers because electronic components have:
Answer: b) Two stable states
Explanation: Electronic circuits have ON and OFF states, which match binary 1 and 0.
Explanation: Electronic circuits have ON and OFF states, which match binary 1 and 0.
6. Which binary number represents decimal 5?
Answer: a) 101
Explanation: (1×4)+(0×2)+(1×1)=5.
Explanation: (1×4)+(0×2)+(1×1)=5.
7. Binary numbers are mainly used to store:
Answer: c) All types of data
Explanation: Text, images, audio, and video are all converted into binary form.
Explanation: Text, images, audio, and video are all converted into binary form.
8. Which device works using binary signals?
Answer: b) Computer
Explanation: Computers process information using binary signals internally.
Explanation: Computers process information using binary signals internally.
9. Binary 1 indicates:
Answer: c) ON
Explanation: Binary 1 generally represents the ON or TRUE state.
Explanation: Binary 1 generally represents the ON or TRUE state.
10. Binary 0 indicates:
Answer: b) OFF
Explanation: Binary 0 represents OFF or FALSE state.
Explanation: Binary 0 represents OFF or FALSE state.
11. Binary numbers are used in memory storage because:
Answer: c) Easy for machines
Explanation: Machines operate electronically using two-state signals.
Explanation: Machines operate electronically using two-state signals.
12. Which code uses binary to represent characters?
Answer: a) ASCII
Explanation: ASCII assigns binary numbers to letters and symbols.
Explanation: ASCII assigns binary numbers to letters and symbols.
13. Binary addition follows rules similar to:
Answer: a) Decimal addition
Explanation: The method is similar, but digits used are only 0 and 1.
Explanation: The method is similar, but digits used are only 0 and 1.
14. Binary multiplication uses digits:
Answer: c) 0–1
Explanation: Binary system uses only 0 and 1 for calculations.
Explanation: Binary system uses only 0 and 1 for calculations.
15. Logic gates in computers operate using:
Answer: b) Binary signals
Explanation: Logic gates work with 0 and 1 inputs and outputs.
Explanation: Logic gates work with 0 and 1 inputs and outputs.
16. Which of the following is a valid binary number?
Answer: c) 1010
Explanation: Binary numbers contain only 0 and 1.
Explanation: Binary numbers contain only 0 and 1.
17. Binary is also called base:
Answer: a) 2
Explanation: Binary number system has base 2.
Explanation: Binary number system has base 2.
18. Computers convert human-readable data into:
Answer: b) Binary form
Explanation: Internally, all data is processed as binary code.
Explanation: Internally, all data is processed as binary code.
19. Which component stores binary data permanently?
Answer: b) Hard Disk
Explanation: Hard disk stores data in binary format even when power is off.
Explanation: Hard disk stores data in binary format even when power is off.
20. Binary numbers help computers to:
Answer: b) Perform calculations quickly
Explanation: Binary processing enables fast and accurate electronic calculations.
Explanation: Binary processing enables fast and accurate electronic calculations.
