Shift Registers - General Questions (4)

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Shift Registers - General Questions

25.

What is a recirculating register?

A.	serial out connected to serial in
B.	all Q outputs connected together
C.	a register that can be used over again

Answer: Option A

Explanation:

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26.

What is the difference between a ring shift counter and a Johnson shift counter?

A.	There is no difference.
B.	A ring is faster.
C.	The feedback is reversed.
D.	The Johnson is faster.

Answer: Option C

Explanation:

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27.

The primary purpose of a three-state buffer is usually:

A.	to provide isolation between the input device and the data bus
B.	to provide the sink or source current required by any device connected to its output without loading down the output device
C.	temporary data storage
D.	to control data flow

Answer: Option A

Explanation:

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28.

What are the three output conditions of a three-state buffer?

A.	HIGH, LOW, float
B.	1, 0, float
C.	both of the above
D.	neither of the above

Answer: Option C

Explanation:

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29.

An 8-bit serial in/serial out shift register is used with a clock frequency of 150 kHz. What is the time delay between the serial input and the Q₃ output?

A.	1.67
B.	26.67
C.	26.7 ms
D.	267 ms

Answer: Option B

Explanation:

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30.

How is a strobe signal used when serially loading a shift register?

A.	to turn the register on and off
B.	to control the number of clocks
C.	to determine which output Qs are used
D.	to determine the FFs that will be used

Answer: Option B

Explanation:

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31.

How many clock pulses will be required to completely load serially a 5-bit shift register?

A.	2
B.	3
C.	4
D.	5

Answer: Option A

Explanation:

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32.

A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position(s) for each clock pulse.

A.	right, one
B.	right, two
C.	left, one
D.	left, three

Answer: Option A

Explanation:

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Shift Registers - General Questions (4)

Shift Registers - General Questions

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