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Test: Demultiplexers - 1 - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test GATE Electrical Engineering (EE) 2024 Mock Test Series - Test: Demultiplexers - 1

Test: Demultiplexers - 1 for Electrical Engineering (EE) 2024 is part of GATE Electrical Engineering (EE) 2024 Mock Test Series preparation. The Test: Demultiplexers - 1 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Demultiplexers - 1 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Demultiplexers - 1 below.
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Test: Demultiplexers - 1 - Question 1

The word demultiplex means ___________

Detailed Solution for Test: Demultiplexers - 1 - Question 1

The word demultiplex means “one into many” and distributor. A demultiplexer sends a single input to multiple outputs, depending on the select lines. It is clear from the diagram:

Test: Demultiplexers - 1 - Question 2

Most demultiplexers facilitate which type of conversion?

Detailed Solution for Test: Demultiplexers - 1 - Question 2

A demultiplexer sends a single input to multiple outputs, depending on the select lines. Demultiplexer converts single input into multiple outputs.

Test: Demultiplexers - 1 - Question 3

In a multiplexer the output depends on its ___________

Detailed Solution for Test: Demultiplexers - 1 - Question 3

A demultiplexer sends a single input to multiple outputs, depending on the select lines. As the select input changes, the output of the multiplexer varies according to that input.

Test: Demultiplexers - 1 - Question 4

How many AND gates are required for a 1-to-8 multiplexer?

Detailed Solution for Test: Demultiplexers - 1 - Question 4

The number of AND gates required will be equal to the number of outputs in a demultiplexer, which are 8.

Test: Demultiplexers - 1 - Question 5

Which IC is used for the implementation of 1-to-16 DEMUX?

Detailed Solution for Test: Demultiplexers - 1 - Question 5

IC 74154 is used for the implementation of 1-to-16 DEMUX, whose output is inverted input.

Test: Demultiplexers - 1 - Question 6

Why is a demultiplexer called a data distributor?

Detailed Solution for Test: Demultiplexers - 1 - Question 6

A demultiplexer sends a single input to multiple outputs, depending on the select lines. For one input, the demultiplexer gives several outputs. That is why it is called a data distributor.

Test: Demultiplexers - 1 - Question 7

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

Detailed Solution for Test: Demultiplexers - 1 - Question 7

The formula for total no. of outputs is given by 2n, where n is the no. of select lines. Therefore, for 1:4 demultiplexer, 2 select lines are required.

Test: Demultiplexers - 1 - Question 8

In 1-to-4 multiplexer, if C1 = 0 & C2 = 1, then the output will be ___________

Detailed Solution for Test: Demultiplexers - 1 - Question 8

It can be calculated from the figure shown below:

For C0 =1 and C1 = 0, Y1 will be the output as 0 and 1 are the bit combinations of 1.

Test: Demultiplexers - 1 - Question 9

How many select lines are required for a 1-to-8 demultiplexer?

Detailed Solution for Test: Demultiplexers - 1 - Question 9

The formula for total no. of outputs is given by 2n, where n is the no. of select lines. In this case n = 3 since 23 = 8.

Test: Demultiplexers - 1 - Question 10

The output Q4 of this 1-to-8 demultiplexer is ____________

Detailed Solution for Test: Demultiplexers - 1 - Question 10

The output Y4 = Q2.(Q1)’.(Q0)’.I. since the bit combinations of 4 are 100.

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