msi-logic-circuits digital-electronics question and answers -Page 5

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MSI Logic Circuits problems

1. The select inputs to a multiplexer may also be called address lines.
Options
A. True
B. False

Correct Answer: True

2. It is normal for more than one decoder output to be active at the same time.
Options
A. True
B. False

Correct Answer: False

3. In HDL, a process is usually thought of as a wire connecting two points in a circuit.
Options
A. True
B. False

Correct Answer: False

4. When data input I₁ of a 74148 octal-to-binary encoder is active, the data output is:

A₀ = 0
A₁ = 0
A₂ = 1
Options
A. True
B. False

Correct Answer: False

5. Basically, a multiplexer changes parallel data inputs to a serial output.
Options
A. True
B. False

Correct Answer: True

6. The outputs of a 7485 four-bit magnitude comparator when the inputs are A = 0110 and B = 1010 are:

A < B is 1
A = B is 0
A > B is 1
Options
A. True
B. False

Correct Answer: False

7. Modern computers transfer data between different devices over a common set of connecting lines called a data bus.
Options
A. True
B. False

Correct Answer: True

8. A very important attribute of the conditional signal assignment statement is its sequential operation.
Options
A. True
B. False

Correct Answer: True

9. In order to select data input I₃ of a 74151 eight-line multiplexer, the select inputs must be:
Options
A. True
B. False

Correct Answer: True

10. Output 6 of a 74138 octal decoder is selected when it is enabled by a data input of:

A₀ = 1
A₁ = 1
A₂ = 0
Options
A. True
B. False

Correct Answer: False

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