Q.1

How can parallel data be taken out of a shift register simultaneously?

  • Use the Q output of the first FF.
  • Use the Q output of the last FF.
  • Tie all of the Q outputs together.
  • Use the Q output of each FF.
Q.2

With a 200 kHz clock frequency, eight bits can be serially entered into a shift register in ________.

  • 4 μs
  • 40 μs
  • 400 μs
  • 40 ms
Q.3

A modulus-12 ring counter requires a minimum of ________.

  • 10 flip-flops
  • 12 flip-flops
  • 6 flip-flops
  • 2 flip-flops
Q.4

How would a latch circuit be used in a microprocessor system?

  • as transportation for Intel employees
  • for a group of data that is the same
  • as a set of common connections for transfer of data
Q.5

If a 10-bit ring counter has an initial state 1101000000, what is the state after the second clock pulse?

  • 1101000000
  • 0011010000
  • 1100000000
  • 0000000000
Q.6

In a parallel in/parallel out shift register, D0 = 1, D1 = 1, D2 = 1, and D3 =After three clock pulses, the data outputs are ________.

  • 1110
  • 0001
  • 1100
  • 1000
Q.7

The group of bits 10110111 is serially shifted (right-most bit first) into an 8-bit parallel output shift register with an initial stateAfter two clock pulses, the register contains ________.

  • 10111000
  • 10110111
  • 11110000
  • 11111100
Q.8

What is meant by parallel load of a shift register?

  • All FFs are preset with data.
  • Each FF is loaded with data, one at a time.
Q.9

A sequence of equally spaced timing pulses may be easily generated by which type of counter circuit?

  • ring shift
  • clock
  • Johnson
  • binary
Q.10

Stepper motors have become popular in digital automation systems because ________.

  • of their low cost
  • they are driven by sequential digital signals
  • they can be used to provide repetitive mechanical movement
  • they are driven by sequential digital signals and can be used to provide repetitive mechanical movement
Q.11

A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position(s) for each clock pulse.

  • right, one
  • right, two
  • left, one
  • left, three
Q.12

How much storage capacity does each stage in a shift register represent?

  • One bit
  • Two bits
  • Four bits (one nibble)
  • Eight bits (one byte)
Q.13

Another way to connect devices to a shared data bus is to use a ________.

  • circulating gate
  • transceiver
  • bidirectional encoder
  • strobed latch
Q.14

Ring shift and Johnson counters are:

  • synchronous counters
  • aynchronous counters
  • true binary counters
  • synchronous and true binary counters
Q.15

Another way to connect devices to a shared data bus is to use a ________.

  • circulating gate
  • transceiver
  • bidirectional encoder
  • strobed latch
Q.16

Ring shift and Johnson counters are:

  • synchronous counters
  • aynchronous counters
  • true binary counters
  • synchronous and true binary counters
Q.17

By adding recirculating lines to a 4-bit parallel-in, serial-out shift register, it becomes a ________, ________, and ________-out register.

  • parallel-in, serial, parallel
  • serial-in, parallel, serial
  • series-parallel-in, series, parallel
  • bidirectional in, parallel, series
Q.18

What does the output enable do on the 74395A chip?

  • It determines when data can be loaded.
  • It forces all outputs to go HIGH.
  • It forces all outputs to go LOW.
  • It activates the three-state buffer.
Q.19

To operate correctly, starting a ring shift counter requires:

  • clearing all the flip-flops
  • presetting one flip-flop and clearing all others
  • clearing one flip-flop and presetting all others
  • presetting all the flip-flops
Q.20

The bit sequence 10011100 is serially entered (right-most bit first) into an 8-bit parallel out shift register that is initially clear. What are the Q outputs after four clock pulses?

  • 10011100
  • 11000000
  • 00001100
  • 11110000
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