Explore topic-wise MCQs in Digital Circuits.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

The output of a full subtractor is same as ____________

A. Half adder
B. Full adder
C. Half subtractor
D. Decoder
Answer» C. Half subtractor
Discussion
2.

The full subtractor can be implemented using ___________

A. Two XOR and an OR gates
B. Two half subtractors and an OR gate
C. Two multiplexers and an AND gate
D. Two comparators and an AND gate
Answer» C. Two multiplexers and an AND gate
Discussion
3.

Full subtractor is used to perform subtraction of ___________

A. 2 bits
B. 3 bits
C. 4 bits
D. 8 bits
Answer» C. 4 bits
Discussion
4.

Let A and B is the input of a subtractor then the borrow will be ___________

A. A AND B’
B. A’ AND B
C. A OR B
D. A AND B
Answer» C. A OR B
Discussion
5.

Let A and B is the input of a subtractor then the output will be ___________

A. A XOR B
B. A AND B
C. A OR B
D. A EXNOR B
Answer» B. A AND B
Discussion
6.

Half subtractor is used to perform subtraction of ___________

A. 2 bits
B. 3 bits
C. 4 bits
D. 5 bits
Answer» B. 3 bits
Discussion
7.

THE_FULL_SUBTRACTOR_CAN_BE_IMPLEMENTED_USING?$

A. Two XOR and an OR gates
B. Two half subtractors and an OR gate
C. Two multiplexers and an AND gate
D. None of the Mentioned
Answer» C. Two multiplexers and an AND gate
Discussion
8.

The output of a full subtractor is same as$

A. Half adder
B. Full adder
C. Half subtractor
D. None of the Mentioned
Answer» C. Half subtractor
Discussion
9.

The_output_of_a_subtractor_is_given_by_(if_A,_B_and_X_are_the_inputs)$

A. A AND B XOR X
B. A XOR B XOR X
C. A OR B NOR X
D. A NOR B XOR X
Answer» C. A OR B NOR X
Discussion
10.

Full subtractor is used to perform subtraction o?

A. 2 bits
B. 3 bits
C. 4 bits
D. 8 bits
Answer» C. 4 bits
Discussion
11.

What does minuend and subtrahend denotes in a subtractor?

A. Their corresponding bits of input
B. Its outputs
C. Its inputs
D. None of the Mentioned
Answer» D. None of the Mentioned
Discussion
12.

Let A and B is the input of a subtractor then the output will be

A. A XOR B
B. A AND B
C. A OR B
D. A EXNOR B
Answer» B. A AND B
Discussion
13.

Let the input of a subtractor is A and B then what the output will be if A = B?

A. 0
B. 1
C. A
D. B
Answer» B. 1
Discussion
14.

How many outputs are required for the implementation of a subtractor?

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
15.

For subtracting 1 from 0, we use to take a _______ from neighbouring bits.

A. Carry
B. Borrow
C. Not possible
D. None of the Mentioned
Answer» C. Not possible
Discussion
16.

Half subtractor is used to perform subtraction of

A. 2 bits
B. 3 bits
C. 4 bits
D. 5 bits
Answer» B. 3 bits
Discussion