Binary to Decimal Conversion Class 7 MCQs
Binary to Decimal Conversion – Class 7 MCQs with Answers & Explanations
Class: CBSE Class 7
Subject: Computer Science
Section: Number System
Topic: Binary to Decimal Conversion
Subject: Computer Science
Section: Number System
Topic: Binary to Decimal Conversion
Strictly Based on NCERT Syllabus | Useful for CBSE Unit Tests • Half‑Yearly • Annual Examinations
1. Binary number system has base:
Answer: a)
Binary system uses only digits 0 and 1, so its base is 2.
Binary system uses only digits 0 and 1, so its base is 2.
2. Decimal equivalent of (1)₂ is:
Answer: b)
Single binary digit 1 equals decimal 1.
Single binary digit 1 equals decimal 1.
3. Decimal equivalent of (10)₂ is:
Answer: b)
1×2¹ + 0×2⁰ = 2.
1×2¹ + 0×2⁰ = 2.
4. Decimal equivalent of (11)₂ is:
Answer: b)
1×2¹ + 1×2⁰ = 3.
1×2¹ + 1×2⁰ = 3.
5. Decimal equivalent of (100)₂ is:
Answer: c)
1×2² = 4.
1×2² = 4.
6. Decimal equivalent of (101)₂ is:
Answer: b)
1×4 + 0×2 + 1×1 = 5.
1×4 + 0×2 + 1×1 = 5.
7. Decimal equivalent of (110)₂ is:
Answer: c)
1×4 + 1×2 = 6.
1×4 + 1×2 = 6.
8. Decimal equivalent of (111)₂ is:
Answer: c)
4 + 2 + 1 = 7.
4 + 2 + 1 = 7.
9. Decimal equivalent of (1000)₂ is:
Answer: c)
1×2³ = 8.
1×2³ = 8.
10. Decimal equivalent of (1001)₂ is:
Answer: c)
8 + 1 = 9.
8 + 1 = 9.
11. Decimal equivalent of (1010)₂ is:
Answer: c)
8 + 2 = 10.
8 + 2 = 10.
12. Decimal equivalent of (1100)₂ is:
Answer: c)
8 + 4 = 12.
8 + 4 = 12.
13. Decimal equivalent of (1111)₂ is:
Answer: d)
8+4+2+1 = 15.
8+4+2+1 = 15.
14. Conversion uses powers of:
Answer: a)
Binary place values are powers of 2.
Binary place values are powers of 2.
15. Rightmost place value is:
Answer: c)
Binary starts with 2⁰ at rightmost side.
Binary starts with 2⁰ at rightmost side.
16. Decimal equivalent of (1011)₂ is:
Answer: c)
8+2+1 = 11.
8+2+1 = 11.
17. Decimal equivalent of (10000)₂ is:
Answer: c)
1×2⁴ = 16.
1×2⁴ = 16.
18. Binary to decimal helps computers:
Answer: a)
Conversion makes binary understandable to users.
Conversion makes binary understandable to users.
19. Decimal equivalent of (0101)₂ is:
Answer: c)
4 + 1 = 5.
4 + 1 = 5.
20. Binary conversion is important for:
Answer: a)
Computers process all digital data using binary conversions.
Computers process all digital data using binary conversions.