Digital Electronics-Shift Registers
Digital Electronics-Shift Registers
41. What is the function of a buffer circuit?
- to provide an output that is inverted from that on the input
- to provide an output that is equal to its input
- to clean up the input
- to clean up the output
42. What is the preset condition for a ring shift counter?
- all FFs set to 1
- all FFs cleared to 0
- a single 0, the rest 1
- a single 1, the rest 0
43. Which is not characteristic of a shift register?
- Serial in/parallel in
- Serial in/parallel out
- Parallel in/serial out
- Parallel in/parallel out
44. To keep output data accurate, 4-bit series-in, parallel-out shift registers employ a ________.
- divide-by-4 clock pulse
- sequence generator
- strobe line
- multiplexer
45. Another way to connect devices to a shared data bus is to use a ________.
- circulating gate
- transceiver
- bidirectional encoder
- strobed latch
46. To serially shift a nibble (four bits) of data into a shift register, there must be ________.
- one clock pulse
- four clock pulses
- eight clock pulses
- one clock pulse for each 1 in the data
47. Computers operate on data internally in a ________ format.
- tristate
- universal
- parallel
- serial
48. In a 4-bit Johnson counter sequence there are a total of how many states, or bit patterns?
- 1
- 2
- 4
- 8
49. If a 10-bit ring counter has an initial state 1101000000, what is the state after the second clock pulse?
- 1101000000
- 0011010000
- 1100000000
- 0000000000
50. How much storage capacity does each stage in a shift register represent?
- One bit
- Two bits
- Four bits (one nibble)
- Eight bits