Q.1

An AND gate and two INVERTERs can be connected to act as a basic decoder.

  • True
  • False
Q.2

Parity checking can only detect an odd number of errors.

  • True
  • False
Q.3

A technique that can be used in multiple-digit numerical displays to control suppression or display of leading or trailing zeros in the display is called _________.

  • advanced zero control
  • time division multiplexing
  • parity generation
  • ripple blanking
Q.4

A sixteen-input multiplexer will need three data select input control lines.

  • True
  • False
Q.5

Parity systems are defined as either_____ or _____ and will add an extra _____ to the digital information being transmitted.

  • positive, negative, byte
  • odd, even, bit
  • upper, lower, digit
  • on, off, decimal
Q.6

A hexadecimal decoder selects one of sixteen outputs depending on the 8-bit binary input applied.

  • True
  • False
Q.7

A multiplexer is a device that chooses which output to send an input to by means of select lines.

  • True
  • False
Q.8

A device that uses a binary decoder to direct a digital signal from a single source to one of several destinations is a ________.

  • multiplexer
  • demultiplexer
  • encoder
  • comparator
Q.9

A code in which each individual digit of a decimal number is represented by a 4-bit binary number is _________.

  • binary coded decimal
  • binary
  • hexadecimal
  • seven-segment code
Q.10

The diodes in a seven-segment display where all cathodes are tied together and grounded are illuminated when a logic ____________________ is applied to the ____________________.

  • LOW, anodes
  • LOW, count down control line
  • HIGH, anode
  • HIGH, count up control line
Q.11

A multiplexer is a device that outputs a fixed sequence of binary states on each clock pulse.

  • True
  • False
Q.12

The general function of a decoder is to activate one or more circuit outputs upon detection of a particular digital state.

  • True
  • False
Q.13

An encoder circuit is designed to generate specific codes.

  • True
  • False
Q.14

A decoder with two inputs will have two outputs for the decoded value.

  • True
  • False
Q.15

A magnitude comparator outputs the highest or lowest value of its inputs depending on control signals.

  • True
  • False
Q.16

A basic multiplexer principle can be demonstrated through the use of a:

  • single-pole relay
  • DPDT switch
  • rotary switch
  • linear stepper
Q.17

When two or more inputs are active simultaneously, the process is called:

  • first-in, first-out processing
  • priority encoding
  • ripple blanking
  • priority decoding
Q.18

How many inputs are required for a 1-of-10 BCD decoder?

  • 4
  • 8
  • 10
  • 1
Q.19

In a BCD-to-seven-segment converter, why must a code converter be utilized?

  • No conversion is necessary.
  • to convert the 4-bit BCD into gray code
  • to convert the 4-bit BCD into 10-bit code
  • to convert the 4-bit BCD into 7-bit code
Q.20

Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?

  • hexadecimal
  • dual octal outputs
  • binary-to-hexadecimal
  • hexadecimal-to-binary
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