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Digital Electronics - Combinational Logic Circuits


Exercise

"I never think of the future. It comes soon enough."
- Albert Einstein
1. 

How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?

A. 1B. 2
C. 4D. 8

2. 

Which of the figures shown below represents the exclusive-NOR gate?

A. aB. b
C. cD. d

3. 

Which of the circuits in figure (a to d) is the sum-of-products implementation of figure (e)?

A. aB. b
C. cD. d

4. 

For the device shown here, let all D inputs be LOW, both S inputs be HIGH, and the input be LOW. What is the status of the Y output?

A. LOW
B. HIGH
C. Don't Care
D. Cannot be determined

5. 

For the device shown here, let all D inputs be LOW, both S inputs be HIGH, and the input be HIGH. What is the status of the Y output?

A. LOW
B. HIGH
C. Don't Care
D. Cannot be determined




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