Explore topic-wise MCQs in Digital Circuits.

This section includes 17 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.

If A, B and C are the inputs of a full adder then the carry is given by __________

A. A AND B OR (A OR B) AND C
B. A OR B OR (A AND B) C
C. (A AND B) OR (A AND B)C
D. A XOR B XOR (A XOR B) AND C
Answer» B. A OR B OR (A AND B) C
Discussion
2.

If A, B and C are the inputs of a full adder then the sum is given by __________

A. A AND B AND C
B. A OR B AND C
C. A XOR B XOR C
D. A OR B OR C
Answer» D. A OR B OR C
Discussion
3.

The difference between half adder and full adder is __________

A. Half adder has two inputs while full adder has four inputs
B. Half adder has one output while full adder has two outputs
C. Half adder has two inputs while full adder has three inputs
D. All of the Mentioned
Answer» D. All of the Mentioned
Discussion
4.

Half-adders have a major limitation in that they cannot __________

A. Accept a carry bit from a present stage
B. Accept a carry bit from a next stage
C. Accept a carry bit from a previous stage
D. Accept a carry bit from the following stages
Answer» D. Accept a carry bit from the following stages
Discussion
5.

If A and B are the inputs of a half adder, the carry is given by __________

A. A AND B
B. A OR B
C. A XOR B
D. A EX-NOR B
Answer» B. A OR B
Discussion
6.

If A and B are the inputs of a half adder, the sum is given by __________

A. A AND B
B. A OR B
C. A XOR B
D. A EX-NOR B
Answer» D. A EX-NOR B
Discussion
7.

Total number of inputs in a half adder is __________

A. 2
B. 3
C. 4
D. 1
Answer» B. 3
Discussion
8.

In parts of the processor, adders are used to calculate ____________

A. Addresses
B. Table indices
C. Increment and decrement operators
D. All of the Mentioned
Answer» E.
Discussion
9.

IF_A,_B_AND_C_ARE_THE_INPUTS_OF_A_FULL_ADDER_THEN_THE_CARRY_IS_GIVEN_BY?$

A. A AND B OR (A OR B) AND C
B. A OR B OR (A AND B) C
C. (A AND B) OR (A AND B)C
D. A XOR B XOR (A XOR B) AND C
Answer» B. A OR B OR (A AND B) C
Discussion
10.

How_many_AND,_OR_and_EXOR_gates_are_required_for_the_configuration_of_full_adder$

A. 1, 2, 2
B. 2, 1, 2
C. 3, 1, 2
D. 4, 0, 1
Answer» C. 3, 1, 2
Discussion
11.

If A, B and C are the inputs of a full adder then the sum is given b?

A. A AND B AND C
B. A OR B AND C
C. A OR B OR C
D. A XOR B XOR C
Answer» D. A XOR B XOR C
Discussion
12.

The difference between half adder and full adder is

A. Half adder has two inputs while full adder has four inputs
B. Half adder has one output while full adder has two outputs
C. Half adder has two inputs while full adder has three inputs
D. All of the Mentioned
Answer» D. All of the Mentioned
Discussion
13.

Half-adders have a major limitation in that they cannot

A. Accept a carry bit from a present stage
B. Accept a carry bit from a next stage
C. Accept a carry bit from a previous stage
D. None of the Mentioned
Answer» D. None of the Mentioned
Discussion
14.

If A and B are the inputs of a half adder, the sum is given by

A. A AND B
B. A OR B
C. A XOR B
D. A EXOR B
Answer» D. A EXOR B
Discussion
15.

In which operation carry is obtained?

A. Subtraction
B. Addition
C. Multiplication
D. Both addition and subtraction
Answer» C. Multiplication
Discussion
16.

Total number of inputs in a half adder is

A. 2
B. 3
C. 4
D. 1
Answer» B. 3
Discussion
17.

In parts of the processor, adders are used to calculate

A. Addresses
B. Table indices
C. Increment and decrement operators
D. All of the Mentioned
Answer» E.
Discussion