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1.  
10110₂ in decimal is:

Correct Answer: C [22]

Explanation:

16 + 4 + 2 = 22.

2.  
Decimal 19 in binary is:

Correct Answer: B [10011]

Explanation:

16 + 2 + 1 → 10011.

3.  
1F₁₆ in decimal is:

Correct Answer: D [31]

Explanation:

1 × 16 + 15 = 31.

4.  
17₈ in decimal is:

Correct Answer: A [15]

Explanation:

1 × 8 + 7 = 15.

5.  
How many digits does the hexadecimal system use?

Correct Answer: C [16]

Explanation:

0–9 and A–F = 16 digits.

6.  
The 1's complement of 1011010 is:

Correct Answer: D [0100101]

Explanation:

Flip every bit: 0100101.

7.  
Fill in the blank: in binary, 1 + 1 = ____.

Correct Answer: A [10]

Explanation:

1 + 1 = 10 (write 0, carry 1).

8.  
The ASCII value of the capital letter 'A' is:

Correct Answer: B [65]

Explanation:

'A' = 65, 'a' = 97, '0' = 48.

9.  
Which gate gives output 1 only when all its inputs are 1?

Correct Answer: C [AND]

Explanation:

AND is All.

10.  
Which of the following are called universal gates?

Correct Answer: B [NAND and NOR]

Explanation:

Any circuit can be built from NAND alone or NOR alone.

11.  
Odd one out (valid octal numbers):

Correct Answer: D [582]

Explanation:

582 contains the digit 8, which does not exist in octal.

12.  
1010₂ XOR 0110₂ (bit by bit) is:

Correct Answer: A [1100]

Explanation:

XOR gives 1 where the bits differ: 1100.

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