Shift Registers Questions and Answers

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Q41
What is the function of a buffer circuit?
  • 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
Answer: Option B
Q42
What is the preset condition for a ring shift counter?
  • 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
Answer: Option D
Q43
Which is not characteristic of a shift register?
  • A Serial in/parallel in
  • B Serial in/parallel out
  • C Parallel in/serial out
  • D Parallel in/parallel out
Answer: Option A
Q44
To keep output data accurate, 4-bit series-in, parallel-out shift registers employ a ________.
  • A divide-by-4 clock pulse
  • B sequence generator
  • C strobe line
  • D multiplexer
Answer: Option C
Q45
Another way to connect devices to a shared data bus is to use a ________.
  • A circulating gate
  • B transceiver
  • C bidirectional encoder
  • D strobed latch
Answer: Option B
Q46
To serially shift a nibble (four bits) of data into a shift register, there must be ________.
  • A one clock pulse
  • B four clock pulses
  • C eight clock pulses
  • D one clock pulse for each 1 in the data
Answer: Option B
Q47
Computers operate on data internally in a ________ format.
  • A tristate
  • B universal
  • C parallel
  • D serial
Answer: Option C
Q48
In a 4-bit Johnson counter sequence there are a total of how many states, or bit patterns?
  • A 1
  • B 2
  • C 4
  • D 8
Answer: Option D
Q49
If a 10-bit ring counter has an initial state 1101000000, what is the state after the second clock pulse?
  • A 1101000000
  • B 0011010000
  • C 1100000000
  • D 0000000000
Answer: Option B
Q50
How much storage capacity does each stage in a shift register represent?
  • A One bit
  • B Two bits
  • C Four bits (one nibble)
  • D Eight bits
Answer: Option A

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