Flip-Flops - General Questions (8)

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Flip-Flops - General Questions

57.

Which of the following is correct for a D latch?

A.	The output toggles if one of the inputs is held HIGH.
B.	Q output follows the input D when the enable is HIGH.
C.	Only one of the inputs can be HIGH at a time.
D.	The output complement follows the input when enabled.

Answer: Option B

Explanation:

No answer description available for this question.

58.

Master-slave J-K flip-flops are called pulse-triggered or level-triggered devices because input data is read during the entire time the clock pulse is at a LOW level.

A.	True
B.	False

Answer: Option A

Explanation:

No answer description available for this question.

59.

Four positive edge-triggered D flip-flops are used to store a 4-bit binary number as shown below. Determine if the circuit is functioning properly, and if not, what might be wrong.

mcq5_1019_1

A.	The circuit is functioning properly.
B.	Q2 is incorrect; the flip-flop is probably bad.
C.	The input to flip-flop 3 (D2) is probably wrong; check the source of D2.
D.	A bad connection probably exists between FF-3 and FF-4, causing FF-3 not to reset.

Answer: Option B

Explanation:

No answer description available for this question.

60.

When is a flip-flop said to be transparent?

A.	when the Q output is opposite the input
B.	when the Q output follows the input
C.	when you can see through the IC packaging

Answer: Option B

Explanation:

No answer description available for this question

61.

How can the cross-coupled NAND flip-flop be made to have active-HIGH S-R inputs?

A.	It can't be done.
B.	Invert the Q outputs.
C.	Invert the S-R inputs.

Answer: Option C

Explanation:

No answer description available for this question

62.

With regard to a D latch, ________.

A.	the Q output follows the D input when EN is LOW
B.	the Q output is opposite the D input when EN is LOW
C.	the Q output follows the D input when EN is HIGH
D.	the Q output is HIGH regardless of EN's input state

Answer: Option C

Explanation:

No answer description available for this question

63.

Which of the following is correct for a gated D flip-flop?

A.	Only one of the inputs can be HIGH at a time.
B.	Only one of the inputs can be HIGH at a time.
C.	The output complement follows the input when enabled.
D.	Q output follows the input D when the enable is HIGH.

Answer: Option D

Explanation:

No answer description available for this question.

64.

What is the difference between the 7476 and the 74LS76?

A.	the 7476 is master-slave, the 74LS76 is master-slave
B.	the 7476 is edge-triggered, the 74LS76 is edge-triggered
C.	the 7476 is edge-triggered, the 74LS76 is master-slave
D.	the 7476 is master-slave, the 74LS76 is edge-triggered

Answer: Option D

Explanation:

No answer description available for this question

Flip-Flops - General Questions (8)

Flip-Flops - General Questions

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