Logic Gates MCQs

What is a logic gate?

• A device that controls water flow

• A machine that opens gates

• An electronic circuit that performs logical operations

• A program used to draw shapes

Which of the following is NOT a basic type of logic gate?

• AND

• OR

• NOT

• NEXT

How many inputs does a basic AND gate usually have?

• 0

• 1

• 2

• 4

Which logic gate gives a 1 output only if all inputs are 1?

• NOT

• OR

• AND

• NAND

What does a NOT gate do?

• Adds two numbers

• Outputs 1 when input is 1

• Outputs the opposite of the input

• Joins two circuits

What is the symbol of an AND gate?

• A triangle with a circle

• A curved shape

• A D-shaped symbol

• A square

Which logic gate is like a security system that needs both a password and a fingerprint?

• OR gate

• AND gate

• NOT gate

• XOR gate

A NOT gate has how many inputs?

• 0

• 1

• 2

• 3

In an OR gate, the output is 1 when:

• All inputs are 0

• Only one input is 1

• All inputs are 1

• At least one input is 1

Which of these is a real-life use of a NOT gate?

• Light controlled by two switches

• Computer password input

• Reversing a signal (ON to OFF)

• Fan speed control