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  • Question
  • 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

  • Correct Answer
  • they are driven by sequential digital signals and can be used to provide repetitive mechanical movement 


  • Shift Registers problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. How much storage capacity does each stage in a shift register represent?

    • Options
    • A. One bit
    • B. Two bits
    • C. Four bits (one nibble)
    • D. Eight bits (one byte)
    • Discuss


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