Digital Electronics - Code Converters and Multiplexers

Exercise :: Code Converters and Multiplexers - General Questions

26. 

A microcontroller differs from a microprocessor in that it has several ________ ports and ________ built into its architecture, making it better suited for ________ applications.

A. communication, PROMs, control
B. parallel, logic gates, processing
C. input/output, memory, control
D. data, memory, decoding

Answer: Option C

Explanation:

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27. 

How is an encoder different from a decoder?

A. The output of an encoder is a binary code for 1-of-N input.
B. The output of a decoder is a binary code for 1-of-N input.

Answer: Option A

Explanation:

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28. 

Why is the Gray code more practical to use when coding the position of a rotating shaft?

A. All digits change between counts.
B. Two digits change between counts.
C. Only one digit changes between counts.

Answer: Option C

Explanation:

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29. 

For the following conditions on a 7485 magnitude comparator, what will be the state of each of the three outputs?
A0 = 0B0 = 1IA < B = 0
A1 = 1B1 = 0IA = B = 1
A2 = 1B2 = 0IA > B = 0
A3 = 0B3 = 0 

A. A = B = 0, A < B = 0, A > B = 1
B. A = B = 0, A < B = 1, A > B = 0
C. A = B = 1, A < B = 0, A > B = 0
D. A = B = 0, A < B = 0, A > B = 0

Answer: Option A

Explanation:

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30. 

When two or more inputs are active simultaneously, the process is called:

A. first-in, first-out processing
B. priority encoding
C. ripple blanking
D. first-in, first-out processing or priority encoding

Answer: Option B

Explanation:

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