Combinational Logic Circuits - General Question (5)

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Combinational Logic Circuits - General Questions

33.

As a technician you are confronted with a TTL circuit board containing dozens of IC chips. You have taken several readings at numerous IC chips, but the readings are inconclusive because of their erratic nature. Of the possible faults listed, select the one that most probably is causing the problem.

A.	A defective IC chip that is drawing excessive current from the power supply
B.	A solar bridge between the inputs on the first IC chip on the board
C.	An open input on the first IC chip on the board
D.	A defective output IC chip that has an internal open to Vcc

Answer: Option C

Explanation:

No answer description available for this question.

34.

Which of the following combinations cannot be combined into K-map groups?

A.	Corners in the same row
B.	Corners in the same column
C.	Diagonal corners
D.	Overlapping combinations

Answer: Option C

Explanation:

No answer description available for this question

35.

For the device shown here, assume the D input is LOW, both S inputs are HIGH, and the mcq6_01801 input is HIGH. What is the status of the mcq6_02101 outputs?

A.	All are HIGH.
B.	All are LOW.
C.	All but are LOW.
D.	All but are HIGH.

Answer: Option A

Explanation:

No answer description available for this question

36.

Which of the following statements accurately represents the two BEST methods of logic circuit simplification?

A.	Boolean algebra and Karnaugh mapping
B.	Karnaugh mapping and circuit waveform analysis
C.	Actual circuit trial and error evaluation and waveform analysis
D.	Boolean algebra and actual circuit trial and error evaluation

Answer: Option A

Explanation:

No answer description available for this question

37.

The implementation of simplified sum-of-products expressions may be easily implemented into actual logic circuits using all universal ________ gates with little or no increase in circuit complexity. (Select the response for the blank space that will BEST make the statement true.)