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Home Digital Electronics Shift Registers Comments

  • 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 


  • Shift Registers problems


    Search Results


    • 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


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