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Q1. Which of the following is a universal gate?
(A) AND
(B) OR
(C) EX-OR
(D) NAND
Answer: (D) NAND
Q2. Conversion of decimal number 4210 to it’s octal number equivalent is
(A) 578
(B) 428
(C) 478
(D) 528
Answer: (D) 528
Q3. Conversion of binary number 1100012 to its decimal number is
(A) 2710
(B) 4910
(C) 3910
(D) 50105010
Answer: (B) 4910
Q4. What table shows the electrical state of a digital circuit’s output for every possible combination of electrical states in the inputs?
(A) Function table
(B) Truth table
(C) Routing table
(D) ASCII table
Answer: (B) Truth table
Q5. An XOR gate recognizes only words with an __ number of 1’s.
(A) Even
(B) Odd
(C) Different
(D) None of the above
Answer: (B) Odd
Q6. What does 4k represent?
(A) 4000
(B) 4096
(C) 40
(D) 400
Answer: (B) 4096
Q7. How many memory locations can 14 address bits access?
(A) 16,384
(B) 8,192
(C) 4,096
(D) 14
Answer: (A) 16,384
Q8. The digits used in a binary number system are and
(A) 9 and 0
(B) 0 and 1
(C) 1 and 2
(D) 3 and 4
Answer: (B) 0 and 1
Q9. A __ is a group of devices that store digital data.
(A) Circuits
(B) Register
(C) Variations
(D) Bit
Answer: (B) Register
Q10. Flip-flop outputs are always
(A) Complimentary
(B) The same
(C) Independent of each other
(D) Same as inputs
Answer: (B) Register
Q11. Conversion of an octal number 1108 to its decimal number is
(A) 7010
(B) 7210
(C) 7310
(D) 11010
Answer: (B) 7210
Q12. Conversion of binary number 11000012 to hexadecimal is
(A) 5716
(B) 6116
(C) 5116
(D) 4316
Answer:(B) 6116
Q13. What advantages do ICs have over discrete-device circuits due to their greater complexity (i.e. more circuitry in less area)
(A) Smaller size
(B) Higher reliability
(C) Lower cost
(D) All of the above
Answer: (D) All of the above
Q14. Express -7 as 16-bit signed binary numbers.
(A) 0000 0000 0000 0111
(B) 1000 0000 0000 0111
(C) 0111 0000 0000 0001
(D) 0111 0000 0000 0000
Answer: (B) 1000 0000 0000 0111
Q15. The XOR gates are ideal for testing parity because even-parity words produce a output and odd-parity words produce a output
(A) Low, high
(B) High, low
(C) Odd, even
(D) Even, odd
Answer: (A) Low, high
Digital Computer Electronics MCQ – All Set
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