Key Topic 34: Logic Gates

Question 1

3-34E1: What is a characteristic of an AND gate?

A. Produces a logic “0” at its output only if all inputs are logic “1”.
B. Produces a logic “1” at its output only if all inputs are logic “1”.
C. Produces a logic “1” at its output if only one input is a logic “1”.
D. Produces a logic “1” at its output if all inputs are logic “0”.

Answer 1

B. Produces a logic “1” at its output only if all inputs are logic “1”.

Question 2

3-34E2: What is a characteristic of a NAND gate?

A. Produces a logic “0” at its output only when all inputs are logic “0”.
B. Produces a logic “1” at its output only when all inputs are logic “1”.
C. Produces a logic “0” at its output if some but not all of its inputs are logic “1”.
D. Produces a logic “0” at its output only when all inputs are logic “1”.

Answer 2

D. Produces a logic “0” at its output only when all inputs are logic “1”.

Question 3

3-34E3: What is a characteristic of an OR gate?

A. Produces a logic “1” at its output if any input is logic “1”.
B. Produces a logic “0” at its output if any input is logic “1”.
C. Produces a logic “0” at its output if all inputs are logic “1”.
D. Produces a logic “1” at its output if all inputs are logic “0”.

Answer 3

A. Produces a logic “1” at its output if any input is logic “1”.

Question 4

3-34E4: What is a characteristic of a NOR gate?

A. Produces a logic “1” at its output if any input is logic “1”.
B. Produces a logic “0” at its output if all inputs are logic “1”.
C. Produces a logic “0” at its output if any or all inputs are logic “1”.
D. Produces a logic “1” at its output if some but not all of its inputs are logic “1”.

Answer 4

C. Produces a logic “0” at its output if any or all inputs are logic “1”.

Question 5

3-34E5: What is a characteristic of a NOT gate?

A. Does not allow data transmission when its input is high.
B. Produces a logic “0” at its output when the input is logic “1” and vice versa.
C. Allows data transmission only when its input is high.
D. Produces a logic “1” at its output when the input is logic “1” and vice versa.

Answer 5

B. Produces a logic “0” at its output when the input is logic “1” and vice versa.

Question 6

3-34E6: Which of the following logic gates will provide an active high out when both inputs are active high?

A. NAND.
B. NOR.
C. AND.
D. XOR.

Answer 6

C. AND.