Binary Number System MCQs for Class 8
Binary Number System โ MCQs with Answers & Explanations
Class: 8
Subject: Computer Science
Section: Number System
Topic: Binary Number System
Board: CBSE (Based on NCERT Examination Pattern)
Subject: Computer Science
Section: Number System
Topic: Binary Number System
Board: CBSE (Based on NCERT Examination Pattern)
1. Binary number system uses how many digits?
Answer: C
Explanation: Binary uses only two digits โ 0 and 1 โ making it base-2.
Explanation: Binary uses only two digits โ 0 and 1 โ making it base-2.
2. Base of Binary system is:
Answer: A
Explanation: Binary is called base-2 because it has two symbols.
Explanation: Binary is called base-2 because it has two symbols.
3. Binary equivalent of decimal 1 is:
Answer: B
Explanation: Decimal 1 equals binary 1.
Explanation: Decimal 1 equals binary 1.
4. Binary of decimal 2 is:
Answer: A
Explanation: 2 = 2ยน โ Binary 10.
Explanation: 2 = 2ยน โ Binary 10.
5. Binary of decimal 3 is:
Answer: C
Explanation: 3 = 2 + 1 โ 11.
Explanation: 3 = 2 + 1 โ 11.
6. Binary of decimal 4 is:
Answer: A
Explanation: 4 = 2ยฒ โ 100.
Explanation: 4 = 2ยฒ โ 100.
7. Decimal equivalent of binary 101 is:
Answer: C
Explanation: 101 = 4 + 1 = 5.
Explanation: 101 = 4 + 1 = 5.
8. Decimal equivalent of 111 is:
Answer: C
Explanation: 111 = 4 + 2 + 1 = 7.
Explanation: 111 = 4 + 2 + 1 = 7.
9. 1 Byte equals:
Answer: C
Explanation: 8 bits = 1 Byte.
Explanation: 8 bits = 1 Byte.
10. Binary digit is called:
Answer: B
Explanation: Bit = Binary Digit.
Explanation: Bit = Binary Digit.
11. Binary addition: 1 + 1 =
Answer: B
Explanation: 1+1 gives sum 0 and carry 1 โ 10.
Explanation: 1+1 gives sum 0 and carry 1 โ 10.
12. Binary subtraction: 10 โ 1 =
Answer: B
Explanation: 2 โ 1 = 1 โ Binary 1.
Explanation: 2 โ 1 = 1 โ Binary 1.
13. Binary represents electrical states:
Answer: B
Explanation: 1 = ON, 0 = OFF.
Explanation: 1 = ON, 0 = OFF.
14. Binary is mainly used in:
Answer: B
Explanation: Computers process data in binary.
Explanation: Computers process data in binary.
15. Binary of decimal 6 is:
Answer: B
Explanation: 6 = 4 + 2 โ 110.
Explanation: 6 = 4 + 2 โ 110.
16. Binary of decimal 7 is:
Answer: C
Explanation: 7 = 4 + 2 + 1 โ 111.
Explanation: 7 = 4 + 2 + 1 โ 111.
17. Binary of decimal 8 is:
Answer: A
Explanation: 8 = 2ยณ โ 1000.
Explanation: 8 = 2ยณ โ 1000.
18. Which is NOT a binary number?
Answer: C
Explanation: Binary cannot contain digit 2.
Explanation: Binary cannot contain digit 2.
19. Binary numbers are made of:
Answer: C
Explanation: Binary uses two digits only.
Explanation: Binary uses two digits only.
20. Binary system is also called:
Answer: C
Explanation: Because it has two symbols.
Explanation: Because it has two symbols.
