MCQ IN COMPUTER SCIENCE & ENGINEERING

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COMPUTER SCIENCE AND ENGINEERING

DIGITAL LOGIC

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
AND Gate:IF A and B are ON, the output would be ____
A
ON
B
OFF
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Detailed Solution. The output of AND gate is given as AB hence its value is logic 1 when both inputs A and B are logic 1’s.

Detailed explanation-2: -In Boolean algebra, output of AND gate is written as Y=A.

Detailed explanation-3: -When the inputs are 1 and 0, the output is zero.

Detailed explanation-4: -The XOR and XNOR gates are the hybrids gates. The 2-input OR gate is also known as the Inclusive-OR gate because when both inputs A and B are set to 1, the output comes out 1(high). In the Ex-OR function, the logic output “1” is obtained only when either A="1” or B="1” but not both together at the same time.

Detailed explanation-5: -Detailed Solution. Key Points: 1) The output is low or ‘0’ when both the inputs are the same. Hence XOR gate can be used to know whether two digital inputs are identical.

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