Ex-OR and Ex-NOR Gates

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.

Q2: Which type of gate can be used to add two bits?

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

Q4: A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is a(n):

A Ex-NOR gate

B OR gate

C Ex-OR gate

D NAND gate

Q5: A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):

A Ex-NOR gate

B OR gate

C Ex-OR gate

D NAND gate

Q6: Identify the type of gate below from the equation 

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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