51. (479)₁₀ in hexadecimal is:
- 1FD
- 2DF
- 1EF
- 1DF
Answer: D) 1DF
Explanation: 256 + 13×16 + 15 = 479.
MCQs / Computer Science / Number Systems and Conversions
Number Systems and Conversions MCQs — Computer Science (page 3)
55 multiple-choice questions on Number Systems and Conversions from Computer Science, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.
52. (2F)₁₆ in decimal is:
- 32
- 47
- 45
- 215
Answer: B) 47
Explanation: 2×16 + 15 = 47.
53. (64)₁₀ in octal is:
- 64
- 100
- 80
- 1000
Answer: B) 100
Explanation: 64 = 1×8².
54. The base of the hexadecimal number system is:
- 10
- 16
- 2
- 8
Answer: B) 16
Explanation: Hex uses 0–9 and A–F.
55. (11001)₂ in decimal is:
- 25
- 26
- 21
- 19
Answer: A) 25
Explanation: 16 + 8 + 1 = 25.
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