Q.1

The exclusive-OR is written in a Boolean equation as a plus sign with a circle around it.

  • True
  • False
Q.2

The odd/even parity system would require a sixth bit to be added to a 4-bit system.

  • True
  • False
Q.3

Parity generator and checker circuits are available in single IC packages.

  • True
  • False
Q.4

Electrical noise does not affect the transmission of binary information.

  • True
  • False
Q.5

The Ex-NOR is sometimes called the equality gate.

  • True
  • False
Q.6

In an exclusive-OR, both inputs cannot be HIGH to provide a HIGH output.

  • True
  • False
Q.7

A parity checker is constructed in the same way as a parity generator, except that in a 4-bit system there must be five inputs, and the output is used as the error indicator.

  • True
  • False
Q.8

Using the CPLD design environment, we can simulate any combinations of inputs and observe the resulting output to check for proper circuit operation.

  • True
  • False
Q.9

In a parity generator circuit, an error is signaled on an error indicator.

  • True
  • False
Q.10

The exclusive-OR provides a LOW input if one input or the other input is HIGH.

  • True
  • False
Q.11

Select the statement that best describes the parity method of error detection:

  • Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
  • Parity checking is not suitable for detecting single-bit errors in transmitted codes.
  • Parity checking is best suited for detecting single-bit errors in transmitted codes.
  • Parity checking is capable of detecting and correcting errors in transmitted codes.
Q.12

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.13

The Ex-NOR is sometimes called the ________.

  • parity gate
  • equality gate
  • inverted OR
  • parity gate or the equality gate
Q.14

A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is a(n):

  • Ex-NOR gate
  • OR gate
  • Ex-OR gate
  • NAND gate
Q.15

A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):

  • Ex-NOR gate
  • OR gate
  • Ex-OR gate
  • NAND gate
Q.16

Which type of gate can be used to add two bits?

  • Ex-OR
  • Ex-NOR
  • Ex-NAND
  • NOR
Q.17

How is odd parity generated differently from even parity?

  • The first output is inverted.
  • The last output is inverted.
Q.18

Why is an exclusive-NOR gate also called an equality gate?

  • The output is false if the inputs are equal.
  • The output is true if the inputs are opposite.
  • The output is true if the inputs are equal.
Q.19

Show from the truth table how an exclusive-OR gate can be used to invert the data on one input if the other input is a special control function.

  • Using A as the control, when A = 0, X is the same as B. When A = 1, X is the same as B.
  • Using A as the control, when A = 0, X is the same as B. When A = 1, X is the inverse of B.
  • Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the same as B.
  • Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the inverse of B.
Q.20

Determine odd parity for each of the following data words:
1011101        11110111        1001101

  • P = 1, P = 1, P = 0
  • P = 0, P = 0, P = 0
  • P = 1, P = 1, P = 1
  • P = 0, P = 0, P = 1
0 h : 0 m : 1 s