# Q1: 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.

A Using A as the control, when A = 0, X is the same as B. When A = 1, X is the same as B.
B Using A as the control, when A = 0, X is the same as B. When A = 1, X is the inverse of B.
C Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the same as B.
D Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the inverse of B.

A Ex-OR
B Ex-NOR
C Ex-NAND
D NOR

# Q3: The Ex-NOR is sometimes called the ________.

A parity gate
B equality gate
C inverted OR
D parity gate or the equality gate

A Ex-NOR gate
B OR gate
C Ex-OR gate
D NAND gate

A Ex-NOR gate
B OR gate
C Ex-OR gate
D NAND gate

A Ex-NOR gate
B OR gate
C Ex-OR gate
D NAND gate

# Q7: Parity systems are defined as either________ or ________ and will add an extra ________ to the digital information being transmitted.

A positive, negative, byte
B odd, even, bit
C upper, lower, digit
D on, off, decimal

# Q8: Why is an exclusive-NOR gate also called an equality gate?

A The output is false if the inputs are equal.
B The output is true if the inputs are opposite.
C The output is true if the inputs are equal.

# Q9: Select the statement that best describes the parity method of error detection:

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

# Q10: How is odd parity generated differently from even parity?

A The first output is inverted.
B The last output is inverted.

# Q11:Determine odd parity for each of the following data words: 1011101        11110111        1001101

A P = 1, P = 1, P = 0
B P = 0, P = 0, P = 0
C P = 1, P = 1, P = 1
D P = 0, P = 0, P = 1

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