Shift Registers Questions and Answers

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Showing 10 of 69 questions
Q21
How would a latch circuit be used in a microprocessor system?
  • A as transportation for Intel employees
  • B for a group of data that is the same
  • C as a set of common connections for transfer of data
Answer: Option C
Q22
A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position(s) for each clock pulse.
  • A right, one
  • B right, two
  • C left, one
  • D left, three
Answer: Option A
Q23
How many clock pulses will be required to completely load serially a 5-bit shift register?
  • A 2
  • B 3
  • C 4
  • D 5
Answer: Option D
Q24
How is a strobe signal used when serially loading a shift register?
  • 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
Answer: Option B
Q25
What are the three output conditions of a three-state buffer?
  • A HIGH, LOW, float
  • B 1, 0, float
  • C both of the above
  • D neither of the above
Answer: Option C
Q26
The primary purpose of a three-state buffer is usually:
  • A to provide isolation between the input device and the data bus
  • B to provide the sink or source current required by any device connected to its output without loading down the output device
  • C temporary data storage
  • D to control data flow
Answer: Option A
Q27
What is the difference between a ring shift counter and a Johnson shift counter?
  • A There is no difference.
  • B A ring is faster.
  • C The feedback is reversed.
  • D The Johnson is faster.
Answer: Option C
Q28
What is a recirculating register?
  • A serial out connected to serial in
  • B all Q outputs connected together
  • C a register that can be used over again
Answer: Option A
Q29
When is it important to use a three-state buffer?
  • A when two or more outputs are connected to the same input
  • B when all outputs are normally HIGH
  • C when all outputs are normally LOW
  • D when two or more outputs are connected to two or more inputs
Answer: Option A
Q30
A bidirectional 4-bit shift register is storing the nibble 1110. Its input is LOW. The nibble 0111 is waiting to be entered on the serial data-input line. After two clock pulses, the shift register is storing ________.
  • A 1110
  • B 0111
  • C 1000
  • D 1001
Answer: Option D

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