# Basic logic operations (AND, OR, NOT) MCQ

What is the output of the AND operation when both inputs are 1?

A 0
B 1
C Depends on the inputs
D None of the above
What is the output of the OR operation when both inputs are 0?

A 0
B 1
C Depends on the inputs
D None of the above
What is the output of the NOT operation when the input is 1?

A 0
B 1
C Depends on the inputs
D None of the above
Which of the following is the truth table for the AND operation?

A 00->0, 01->1, 10->1, 11->1
B 00->0, 01->0, 10->0, 11->1
C 00->1, 01->1, 10->1, 11->0
D 00->1, 01->0, 10->0, 11->0
Answer: B 00->0, 01->0, 10->0, 11->1
Which of the following is the truth table for the OR operation?

A 00->0, 01->0, 10->0, 11->1
B 00->0, 01->1, 10->1, 11->1
C 00->1, 01->1, 10->1, 11->0
D 00->1, 01->0, 10->0, 11->0
Answer: B 00->0, 01->1, 10->1, 11->1
Which logic gate inverts its input?

A AND
B OR
C NOT
D NAND
What is the result of the OR operation if one input is 1 and the other is 0?

A 0
B 1
C Depends on the inputs
D None of the above
What is the result of the AND operation if one input is 0 and the other is 1?

A 0
B 1
C Depends on the inputs
D None of the above
Which logic operation would you use to check if at least one of two conditions is true?

A AND
B OR
C NOT
D XOR
What is the binary result of NOT 0?

A 0
B 1
C Depends on the inputs
D None of the above
Which logic gate has the following truth table: 00->1, 01->1, 10->1, 11->0?

A AND
B OR
C NOR
D NAND
What is the primary function of the AND gate?

A To invert the input signal
B To output high only if all inputs are high
C To output high if any input is high
Answer: B To output high only if all inputs are high
Which of the following is the output of an OR gate with inputs 1 and 1?

A 0
B 1
C Depends on the inputs
D None of the above
What is the result of applying the NOT operation to the binary number 1010?

A 0101
B 1101
C 0010
D 1111
Which logic gate would you use to ensure both conditions must be true for the output to be true?

A AND
B OR
C NOT
D NOR
What is the output of the OR operation if both inputs are 1?

A 0
B 1
C Depends on the inputs
D None of the above
Which gate outputs a 1 only if both inputs are different?

A AND
B OR
C XOR
D NOT
What is the result of the AND operation on the binary numbers 1100 and 1010?

A 1110
B 1000
C 0100
D 1101
Which gate’s output is true if and only if all its inputs are false?

A AND
B OR
C NOT
D NOR
What is the output of the NOT operation if the input is 0?

A 0
B 1
C Depends on the inputs
D None of the above

## MCQs of Digital Logic Design (DLD)

Introduction to Digital Systems

Boolean Algebra

1. Basic logic operations (AND, OR, NOT) MCQ
2. Laws and theorems of Boolean algebra MCQ
3. De Morgan’s Theorems MCQ
4. Canonical forms (Sum of Products, Product of Sums) MCQ
5. Simplification techniques (Karnaugh Maps, Quine-McCluskey method) MCQ

Combinational Logic

Logic Gates

Combinational Circuits

Sequential Logic

Flip-Flops and Latches

Counters and Registers

State Machines

Finite State Machines (FSMs)

Memory and Programmable Logic MCQs

Memory Devices

## More MCQs of Digital Logic Design (DLD)

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