1. Number of 2 input multiplexers need to construct a 210 inputs multiplexer is _________ ?

32

9

129

1023

Answer: 1023

Explanation:


2. If 4 input MUXes drive a 4 input multiplexer, it results a ?

16 input MUX

8 input MUX

6 input MUX

4 input MUX

Answer: 16 input MUX

Explanation:


3. A demultiplexer is a ?

1-to-N device

N-to-1 device

1-to-1 device

N-to-N device

Answer: 1-to-N device

Explanation:


4. A multiplexer is a ?

1-to-N device

N-to-1 device

1-to-1 device

N-to-N device

Answer: N-to-1 device

Explanation:


5. The minimum number of 2-to-1 multiplexers required to realize 4-to-1 multiplexer is ?

1

2

3

4

Answer: 3

Explanation:


6. When two 16-input multiplexers drive a 2-input MUX, what is the result ?

2-input MUX

4-input MUX

16-input MUX

32-input MUX

Answer: 32-input MUX

Explanation:


7. The number of select lines needed in a 8 x 1 multiplexer is ?

8

3

2

1

Answer: 3

Explanation:


8. The minimum number of select signals necessary for a 4 to 1 multiplexer is ?

4

1

2

5

Answer: 2

Explanation:


9. _______ lines are contained in a multiplexer with 1024 inputs and one output ?

512

258

64

10

Answer: 10

Explanation:


10. Which one of the following statements is not correct ? Conversion of EXCESS-3 code to BCD can be achieved by using ?

discrete gates

4-16 demultiplexer

A 4-bit full adder

A 4-bit half adder

Answer: A 4-bit half adder

Explanation: