Practice 10 Number Systems multiple-choice questions designed for CDAC CCAT exam preparation. Click "Show Answer" to reveal the correct option with detailed explanation.
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Correct Answer: A — 2
Binary is base-2 number system using only 0 and 1.
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Correct Answer: D — 16
Hexadecimal is base-16, using digits 0-9 and letters A-F.
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Correct Answer: B — 1010
10 in decimal = 1010 in binary (8+2=10).
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Correct Answer: C — 13
1101â‚‚ = 8+4+0+1 = 13 in decimal.
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Correct Answer: B — 15
F in hexadecimal = 15 in decimal.
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Correct Answer: C — 15
17₈ = 1×8 + 7×1 = 8+7 = 15 in decimal.
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Correct Answer: B — 8
Octal is base-8 number system using digits 0-7.
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Correct Answer: A — 0101
1's complement is obtained by inverting all bits: 1010 → 0101.
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Correct Answer: B — 0110
2's complement = 1's complement + 1 = 0101 + 1 = 0110.
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Correct Answer: B — 16
10â‚₆ = 1×16 + 0×1 = 16 in decimal.