Q.1

When data input I6 of a 74148 octal-to-binary encoder is active, the data output is ________.

Q.2

The BCD/DEC decoder shown in figure (a) is examined with a logic analyzer and the results are shown in the waveforms in figure (b). What, if anything, is wrong with the circuit?

  • The "2" output is shorted to Vcc.
  • The A1 input is internally open.
  • The A1 input node is internally stuck LOW.
  • Nothing is wrong with the circuit.
Q.3

A demultiplexer takes an input and turns it into a binary number.

  • True
  • False
Q.4

It is normal for more than one decoder output to be active at the same time.

  • True
  • False
Q.5

In order to select data input I5 of a 74151 eight-line multiplexer, the select inputs must be ________.

Q.6

The diagram given below shows a ________ being used as a(n) ________ and Y = ________.

  • multiplier, divider, 2.25
  • multiplexer, encoder, 7641
  • multiplexer, logic function generator, ABC + ABC + ABC + ABC
  • logic function generator, multiplexer, 1467
Q.7

The BCD/DEC decoder shown in figure (a) is examined with a logic analyzer and the results are shown in the waveforms in figure (b). What, if anything, is wrong with the circuit?

  • The "2" output is shorted to Vcc.
  • The A1 input is internally open.
  • The A1 input node is internally stuck LOW.
  • Nothing is wrong with the circuit.
Q.8

The BCD/DEC decoder shown in figure (a) is examined with a logic analyzer and the results are shown in the waveforms in figure (b). What, if anything, is wrong with the circuit?

  • The "2" output is shorted to Vcc.
  • The A1 input is internally open.
  • The A1 input node is internally stuck LOW.
  • Nothing is wrong with the circuit.
Q.9

A demultiplexer takes an input and turns it into a binary number.

  • True
  • False
Q.10

The device that generates a coded output from a single active numeric input line is ________.

  • a decoder
  • a multiplexer
  • a comparator
  • an encoder
0 h : 0 m : 1 s