Q.1

A one-shot is a special type of multivibrator, which must be triggered to produce each output pulse.

  • True
  • False
Q.2

Edge-triggered flip-flops can be identified by the triangle on the clock input.

  • True
  • False
Q.3

Multivibrators must be level-triggered.

  • True
  • False
Q.4

The 555 timer can be used in either the bistable mode or the monostable mode.

  • True
  • False
Q.5

A D-type flip-flop is constructed by connecting an inverter between the Set and Clock terminals.

  • True
  • False
Q.6

J-K flip-flops are often used as switch debouncers.

  • True
  • False
Q.7

When the S and the R inputs are both HIGH the output of an S-R NOR latch will be unpredictable.

  • True
  • False
Q.8

The J-K flip-flop eliminates the RACE state when both the J and K inputs are HIGH.

  • True
  • False
Q.9

Pulse-triggered flip-flops are identified by a bubble on the Q output terminal.

  • True
  • False
Q.10

When using master-slave flip-flops, the data is entered into the flip-flop on the leading edge of the clock, but the output does not change until the trailing edge of the clock.

  • True
  • False
Q.11

The truth table for an S-R flip-flop has how many VALID entries?

  • 3
  • 1
  • 4
  • 2
Q.12

One example of the use of an S-R flip-flop is as a(n):

  • transition pulse generator
  • astable oscillator
  • racer
  • switch debouncer
Q.13

Which of the following is correct for a gated D-type flip-flop?

  • The Q output is either SET or RESET as soon as the D input goes HIGH or LOW.
  • The output complement follows the input when enabled.
  • Only one of the inputs can be HIGH at a time.
  • The output toggles if one of the inputs is held HIGH.
Q.14

Pulse-triggered flip-flops are also called _________ flip-flops.

  • master-slave
  • postponed
  • level
  • edge
Q.15

A retriggerable one-shot has a pulse width of 10 ms; 3 ms after being triggered, another trigger pulse is applied. The resulting output pulse will be _________ ms.

  • 3
  • 7
  • 10
  • 13
Q.16

What is the significance of the J and K terminals on the J-K flip-flop?

  • There is no known significance in their designations.
  • The J represents "jump," which is how the Q output reacts whenever the clock goes HIGH and the J input is also HIGH.
  • The letters represent the initials of Johnson and King, the co-inventors of the J-K flip-flop.
  • All of the other letters of the alphabet are already in use.
Q.17

If both inputs of an S-R NAND latch are LOW, what will happen to the output?

  • The output would become unpredictable.
  • The output will toggle.
  • The output will reset.
  • No change will occur in the output.
Q.18

When both inputs of a J-K flip-flop cycle, the output will:

  • be invalid
  • not change
  • change
  • toggle
Q.19

For an S-R flip-flop to be SET or RESET, the respective input must be __________.

  • LOW
  • HIGH
  • installed with steering diodes
  • in parallel with a limiting resistor
Q.20

The S-R, D-type, and J-K flip-flops are all examples of _________________.

  • astable multivibrators
  • bistable multivibrators
  • monostable multivibrators
  • tristable multivibrators
0 h : 0 m : 1 s