Digital Electronics - Code Converters and Multiplexers

Exercise :: Code Converters and Multiplexers - General Questions

21. 

One application of a digital multiplexer is to facilitate:

A. data generation
B. serial-to-parallel conversion
C. parity checking
D. data selector

Answer: Option D

Explanation:

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22. 

The primary use for Gray code is:

A. coded representation of a shaft's mechanical position
B. turning on/off software switches
C. to represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery
D. to convert the angular position of a shaft on rotating machinery into hexadecimal code

Answer: Option A

Explanation:

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23. 

Why is a demultiplexer called a data distributor?

A. The input will be distributed to one of the outputs.
B. One of the inputs will be selected for the output.
C. The output will be distributed to one of the inputs.

Answer: Option A

Explanation:

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24. 

What is the status of the inputs S0, S1, and S2 of the 74151 eight-line multiplexer in order for the output Y to be a copy of input I5?

A. S0 = 0, S1 = 1, S2 = 0
B. S0 = 0, S1 = 0, S2 = 1
C. S0 = 1, S1 = 1, S2 = 0
D. S0 = 1, S1 = 0, S2 = 1

Answer: Option D

Explanation:

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25. 

One way to convert BCD to binary using the hardware approach is:

A. with MSI IC circuits
B. with a keyboard encoder
C. with an ALU
D. UART

Answer: Option A

Explanation:

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