PDF --PAGE --5 QUESTION & ANSWER

How many NOT gates are required for the construction of a 4-to-1 multiplexer?

• 3

• 4

• 2

• 5

In a multiplexer the output depends on its

• data inputs

• select inputs

• select outputs

• enable pins

The two inputs MUX would have

• 1 select line

• 2 select line

• 4 select line

• 3 select line

If enable input is high then the multiplexer is

• enable

• disable

• saturation

• High impedance

Demultiplexers are also called

• Decoders

• encoders

• data distributors

• comparators

In 1-to-4 demultiplexer ,how many select lines are required?

• 2

• 3

• 4

• 5

The word demultiplexer means

• one into many

• many to one

• distributor

• one into many as well as distributor

Which of the following circuits can be used as parallel to serial converter

• Multiplexer

• Demultiplexer

• Decoder

• digital counter

Most demultiplexer facilitates which types of conversion?

• Decimal to hexadecimal

• Single input,multiple outputs

• AC to DC

• Odd parity to even parity

Why is a demultiplexer called a data distributor?

• The input will be distributed to one of the outputs

• One of the inputs will be selected for the output

• The output will be distributed to one of the inputs

• Single input to Single Output