CET Digital Electronics and Systems

Question 1

What is a logic gate?

Accepted Answer

A circuit that performs a logical operation on inputs.

Answer

A device that converts digital signals to analog.

Answer

A component that amplifies signals.

Answer

A system used to store digital information.

Question 2

What is the purpose of a flip-flop in digital circuits?

Accepted Answer

Answer

To store analog signals.

Answer

To generate a clock signal.

Answer

To store binary data.

Answer

To amplify signals.

Question 3

What is the role of a microprocessor in digital electronics?

Accepted Answer

Answer

To store binary data.

Answer

To process and execute instructions.

Answer

To regulate the voltage.

Answer

To perform logical operations only.

Question 4

What does a multiplexer do in digital circuits?

Accepted Answer

Answer

It combines multiple outputs into one input.

Answer

It selects one input and sends it to multiple outputs.

Answer

It selects one input signal and sends it to the output.

Answer

It stores data in memory.

Question 5

What is the difference between combinational and sequential circuits?

Accepted Answer

Answer

Combinational circuits use memory, while sequential circuits do not.

Answer

Combinational circuits do not use memory, while sequential circuits do.

Answer

Both circuits use memory in the same way.

Answer

Combinational circuits process inputs sequentially.

Question 6

What is a shift register used for in digital electronics?

Accepted Answer

Answer

To generate clock signals.

Answer

To convert analog signals to digital.

Answer

To store and shift binary data.

Answer

To amplify signals.

Question 7

What is the function of a demultiplexer?

Accepted Answer

Answer

It selects multiple outputs based on a single input.

Answer

It combines multiple input signals into one output.

Answer

It routes a single input signal to one of many outputs.

Answer

It stores a single input signal.

Question 8

What is the function of a decoder in digital systems?

Accepted Answer

Answer

To encode data into binary form.

Answer

To convert data into a readable format.

Answer

To convert a binary input into a unique output.

Answer

To store data in a memory chip.

Question 9

What is a register in a digital circuit?

Accepted Answer

Answer

A storage element for permanent data.

Answer

A circuit for converting analog signals to digital.

Answer

A temporary storage location for data.

Answer

A circuit for routing signals.