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- Question
By adding recirculating lines to a 4-bit parallel-in, serial-out shift register, it becomes a ________, ________, and ________-out register.
Options- A. parallel-in, serial, parallel
- B. serial-in, parallel, serial
- C. series-parallel-in, series, parallel
- D. bidirectional in, parallel, series
- Correct Answer
- parallel-in, serial, parallel
- 1. A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position(s) for each clock pulse.
Options- A. right, one
- B. right, two
- C. left, one
- D. left, three Discuss
- 2. Which type of device may be used to interface a parallel data format with external equipment's serial format?
Options- A. key matrix
- B. UART
- C. memory chip
- D. series in, parallel out Discuss
- 3. On the fifth clock pulse, a 4-bit Johnson sequence is Q0 = 0, Q1 = 1, Q2 = 1, and Q3 = 1. On the sixth clock pulse, the sequence is ________.
Options- A. Q0 = 1, Q1 = 0, Q2 = 0, Q3 = 0
- B. Q0 = 1, Q1 = 1, Q2 = 1, Q3 = 0
- C. Q0 = 0, Q1 = 0, Q2 = 1, Q3 = 1
- D. Q0 = 0, Q1 = 0, Q2 = 0, Q3 = 1 Discuss
- 4. What is a shift register that will accept a parallel input, or a bidirectional serial load and internal shift features, called?
Options- A. tristate
- B. end around
- C. universal
- D. conversion Discuss
- 5. How is a strobe signal used when serially loading a shift register?
Options- 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 Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Shift Registers problems
Search Results
Correct Answer: right, one
Correct Answer: UART
Correct Answer: Q0 = 0, Q1 = 0, Q2 = 1, Q3 = 1
Correct Answer: universal
Correct Answer: to control the number of clocks
Correct Answer: to provide an output that is equal to its input
Correct Answer: 5
Correct Answer: The feedback is reversed.
Correct Answer: four clock pulses
Correct Answer: strobe line
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