Decimal to Binary Conversion MCQs
Decimal to Binary Conversion – Class 7 MCQs with Answers & Explanations
Class: CBSE Class 7
Subject: Computer Science
Section: Number System
Topic: Decimal to Binary Conversion
Subject: Computer Science
Section: Number System
Topic: Decimal to Binary Conversion
Strictly Based on NCERT Syllabus | Useful for CBSE Unit Tests • Half‑Yearly • Annual Examinations
1. Decimal number system has base:
Answer: c)
Decimal system uses digits 0–9, so its base is 10.
Decimal system uses digits 0–9, so its base is 10.
2. Binary number system has base:
Answer: a)
Binary uses only two digits: 0 and 1.
Binary uses only two digits: 0 and 1.
3. Decimal 2 in binary is:
Answer: a)
2 ÷ 2 gives remainder 0, quotient 1 → 10.
2 ÷ 2 gives remainder 0, quotient 1 → 10.
4. Decimal 3 in binary is:
Answer: b)
3 ÷ 2 remainders give binary 11.
3 ÷ 2 remainders give binary 11.
5. Decimal 4 in binary is:
Answer: a)
4 = 2² → Binary 100.
4 = 2² → Binary 100.
6. Decimal 5 in binary is:
Answer: a)
5 = 4 + 1 → Binary 101.
5 = 4 + 1 → Binary 101.
7. Decimal 6 in binary is:
Answer: c)
6 = 4 + 2 → Binary 110.
6 = 4 + 2 → Binary 110.
8. Decimal 7 in binary is:
Answer: c)
7 = 4 + 2 + 1 → Binary 111.
7 = 4 + 2 + 1 → Binary 111.
9. Decimal 8 in binary is:
Answer: a)
8 = 2³ → Binary 1000.
8 = 2³ → Binary 1000.
10. Decimal 9 in binary is:
Answer: a)
9 = 8 + 1 → Binary 1001.
9 = 8 + 1 → Binary 1001.
11. Decimal 10 in binary is:
Answer: a)
10 = 8 + 2 → Binary 1010.
10 = 8 + 2 → Binary 1010.
12. Decimal 12 in binary is:
Answer: a)
12 = 8 + 4 → Binary 1100.
12 = 8 + 4 → Binary 1100.
13. Decimal 15 in binary is:
Answer: a)
15 = 8+4+2+1 → Binary 1111.
15 = 8+4+2+1 → Binary 1111.
14. Conversion is done using:
Answer: a)
Decimal is divided repeatedly by 2 and remainders noted.
Decimal is divided repeatedly by 2 and remainders noted.
15. Remainders are read:
Answer: b)
Binary digits are read upward from last remainder.
Binary digits are read upward from last remainder.
16. Decimal 1 in binary is:
Answer: a)
1 in decimal equals 1 in binary.
1 in decimal equals 1 in binary.
17. Decimal 0 in binary is:
Answer: a)
0 remains 0 in binary.
0 remains 0 in binary.
18. Binary of 16 is:
Answer: a)
16 = 2⁴ → Binary 10000.
16 = 2⁴ → Binary 10000.
19. Decimal to binary is used in:
Answer: a)
Computers store and process data in binary.
Computers store and process data in binary.
20. Conversion helps computers to:
Answer: a)
Binary conversion enables digital data processing.
Binary conversion enables digital data processing.