Logic Gates: Interactive Quizzes for Electrical and Electronic Principles

Question 1

What is the primary function of a NOT gate?

Accepted Answer

Inverting the input signal

Answer

Amplifying the input signal

Answer

Combining multiple input signals

Answer

Storing the input signal

Question 2

What is the output of an OR gate when one input is true and the other is false?

Accepted Answer

True

Answer

False

Answer

High impedance

Answer

Indeterminate

Question 3

Which logic gate is considered a universal logic gate?

Accepted Answer

NAND

Answer

NOR

Answer

AND

Answer

OR

Question 4

What is the key difference between combinatorial and sequential logic circuits?

Accepted Answer

Sequential circuits include memory elements, while combinatorial circuits do not

Answer

Combinatorial circuits include memory elements, while sequential circuits do not

Answer

Combinatorial circuits are faster than sequential circuits

Answer

Sequential circuits are more complex than combinatorial circuits

Question 5

What is the primary function of a NOT gate?

Accepted Answer

To invert the input

Answer

To pass the input through unchanged

Answer

To perform a logical OR operation

Answer

To perform a logical AND operation

Question 6

Which Boolean expression is valid for a NOR gate?

Accepted Answer

!(A & B)

Answer

A + B

Answer

A * B

Answer

A | B

Question 7

Which characteristic is a defining feature of digital signals?

Accepted Answer

Discrete values

Answer

Continuous amplitude

Answer

Analog waveform

Answer

Periodic variation

Question 8

What is the purpose of a pull-up resistor in a digital circuit?

Accepted Answer

To establish a default high input

Answer

To prevent short circuits

Answer

To amplify signals

Answer

To filter out noise

Question 9

Which logic family is known for both high speed and low power consumption?

Accepted Answer

CMOS

Answer

TTL

Answer

ECL

Answer

NMOS

Question 10

What logic gate is often referred to as the "universal gate"?

Accepted Answer

NAND gate

Answer

AND gate

Answer

OR gate

Answer

NOT gate

Question 11

What is the output of a NOT gate when the input is '1'?

Accepted Answer

0

Answer

1

Answer

High impedance

Answer

Floating

Question 12

Which of the following is the Boolean expression for a NOR gate?

Accepted Answer

¬(A + B)

Answer

A + B

Answer

A * B

Answer

¬(A * B)

Question 13

What is the primary function of a Schmitt trigger?

Accepted Answer

To improve noise immunity of a digital circuit

Answer

To amplify a signal

Answer

To convert a digital signal to an analog signal

Answer

To generate a pulse

Question 14

Which of the following is not a type of logic family?

Accepted Answer

JFET

Answer

TTL

Answer

CMOS

Answer

ECL

Question 15

What is the main difference between a combinatorial circuit and a sequential circuit?

Accepted Answer

Combinatorial circuits have no memory, while sequential circuits do

Answer

Sequential circuits have no memory, while combinatorial circuits do

Answer

Combinatorial circuits are used for data processing, while sequential circuits are used for control

Answer

Sequential circuits are used for data processing, while combinatorial circuits are used for control

Question 16

What would be the output of an OR gate with inputs A = 0 and B = 1?

Accepted Answer

1

Answer

A

Answer

0

Question 17

Which of the following is not a type of logic gate?

Accepted Answer

XORX

Answer

NOT

Answer

AND

Answer

OR

Question 18

What is the Boolean expression for a logic gate that outputs '1' when exactly one input is '1'?

Accepted Answer

A XOR B

Answer

A OR B

Answer

A AND B

Answer

A NAND B

Question 19

Which logic gate is used to invert a signal?

Accepted Answer

NOT

Answer

OR

Answer

NAND

Answer

AND

Question 20

Provide the truth table for a NOR gate:

Accepted Answer

A  B  |  Out
0  0  |  1
0  1  |  0
1  0  |  0
1  1  |  0

Answer

A  B  |  Out
0  0  |  1
0  1  |  1
1  0  |  1
1  1  |  0

Answer

A  B  |  Out
0  0  |  0
0  1  |  1
1  0  |  1
1  1  |  1

Question 21

Which logic gate produces an output of '1' if at least one input is '1'?

Accepted Answer

OR

Answer

NOR

Answer

NAND

Answer

AND

Question 22

What is the primary function of a logic gate in a digital circuit?

Accepted Answer

To perform logical operations on input signals.

Answer

To generate waveforms.

Answer

To store information.

Answer

To amplify signals.

Question 23

Which logic gate can be used to create all other logic gates?

Accepted Answer

NAND

Answer

NOT

Answer

OR

Answer

AND