Logic Gates
Q. Which logic gate outputs true only when all inputs are true?
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A.
AND
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B.
OR
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C.
NOT
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D.
NAND
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND
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Q. Which logic gate outputs true only when all its inputs are true?
-
A.
AND Gate
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B.
OR Gate
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C.
NOT Gate
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D.
NAND Gate
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND Gate
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Q. Which logic gate outputs true only when both inputs are false?
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A.
AND
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B.
OR
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C.
NAND
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D.
NOR
Solution
The NOR gate outputs true only when both inputs are false.
Correct Answer: D — NOR
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Q. Which of the following gates is a universal gate?
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A.
AND
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B.
OR
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C.
NAND
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D.
XOR
Solution
The NAND gate is a universal gate because it can be used to create any other gate.
Correct Answer: C — NAND
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Q. Which of the following gates is considered a universal gate?
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A.
AND Gate
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B.
OR Gate
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C.
NAND Gate
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D.
XOR Gate
Solution
The NAND gate is considered a universal gate because it can be used to create any other gate.
Correct Answer: C — NAND Gate
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Q. Which of the following gates is equivalent to an AND gate followed by a NOT gate?
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A.
OR
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B.
NAND
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C.
NOR
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D.
XOR
Solution
The output of an AND gate followed by a NOT gate is a NAND gate.
Correct Answer: B — NAND
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Q. Which of the following is a universal gate?
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A.
AND
-
B.
OR
-
C.
NAND
-
D.
XOR
Solution
The NAND gate is a universal gate because it can be used to create any other gate.
Correct Answer: C — NAND
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Q. Which of the following is the output of the expression NOT (A AND B) when A = 1 and B = 1?
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A.
0
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B.
1
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C.
2
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D.
Undefined
Solution
First, evaluate A AND B which is 1 AND 1 = 1. Then NOT 1 = 0.
Correct Answer: A — 0
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Q. Which of the following is the truth table for an AND gate?
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A.
00, 01, 10, 11
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B.
00, 01, 11, 10
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C.
00, 10, 01, 11
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D.
00, 11, 01, 10
Solution
The truth table for an AND gate is: 00 -> 0, 01 -> 0, 10 -> 0, 11 -> 1.
Correct Answer: A — 00, 01, 10, 11
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