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Home Digital Electronics Shift Registers Comments

  • Question
  • 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.

  • Correct Answer
  • The feedback is reversed. 


  • Shift Registers problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • Discuss
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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.
    • Discuss
    • 9. 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
    • 10. 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


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