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- Question
How can parallel data be taken out of a shift register simultaneously?
Options- A. Use the Q output of the first FF.
- B. Use the Q output of the last FF.
- C. Tie all of the Q outputs together.
- D. Use the Q output of each FF.
- Correct Answer
- Use the Q output of each FF.
- 1. To keep output data accurate, 4-bit series-in, parallel-out shift registers employ a ________.
Options- A. divide-by-4 clock pulse
- B. sequence generator
- C. strobe line
- D. multiplexer Discuss
- 2. To serially shift a nibble (four bits) of data into a shift register, there must be ________.
Options- A. one clock pulse
- B. four clock pulses
- C. eight clock pulses
- D. one clock pulse for each 1 in the data Discuss
- 3. What is the difference between a ring shift counter and a Johnson shift counter?
Options- A. There is no difference.
- B. A ring is faster.
- C. The feedback is reversed.
- D. The Johnson is faster. Discuss
- 4. How many clock pulses will be required to completely load serially a 5-bit shift register?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 5. What is the function of a buffer circuit?
Options- A. to provide an output that is inverted from that on the input
- B. to provide an output that is equal to its input
- C. to clean up the input
- D. to clean up the output Discuss
- 6. Stepper motors have become popular in digital automation systems because ________.
Options- A. of their low cost
- B. they are driven by sequential digital signals
- C. they can be used to provide repetitive mechanical movement
- D. they are driven by sequential digital signals and can be used to provide repetitive mechanical movement Discuss
- 7. What type of register would have a complete binary number shifted in one bit at a time and have all the stored bits shifted out one at a time?
Options- A. parallel-in, parallel-out
- B. parallel-in, serial-out
- C. serial-in, parallel-out
- D. serial-in, serial-out Discuss
- 8. A serial in/parallel out, 4-bit shift register initially contains all 1s. The data nibble 0111 is waiting to enter. After four clock pulses, the register contains ________.
Options- A. 0000
- B. 1111
- C. 0111
- D. 1000 Discuss
- 9. What is the preset condition for a ring shift counter?
Options- A. all FFs set to 1
- B. all FFs cleared to 0
- C. a single 0, the rest 1
- D. a single 1, the rest 0 Discuss
- 10. In a 6-bit Johnson counter sequence there are a total of how many states, or bit patterns?
Options- A. 2
- B. 6
- C. 12
- D. 24 Discuss
Shift Registers problems
Search Results
Correct Answer: strobe line
Correct Answer: four clock pulses
Correct Answer: The feedback is reversed.
Correct Answer: 5
Correct Answer: to provide an output that is equal to its input
Correct Answer: they are driven by sequential digital signals and can be used to provide repetitive mechanical movement
Correct Answer: serial-in, parallel-out
Correct Answer: 0111
Correct Answer: a single 1, the rest 0
Correct Answer: 12
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