Virtual Labs

A two bit comparator circuit with inputs A2A1 and B2B1 is implemented to check >, < and = checking. The expression for the equality output is given by:

a: Four input XNOR gate Explanation

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b: Four input XOR gate Explanation

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c: Four input AND gate Explanation

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d: None of these Explanation

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An XOR gate is to be used as an enable/disable circuit as shown below. The expression for output is?

a: Y=0 Explanation

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b: Y=1 Explanation

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c: Y=A Explanation

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d: Y=A' Explanation

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Choose the correct expression for output Y for the circuit.

a: Y=1 Explanation

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b: Y=0 Explanation

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c: Y = A'B + AB' Explanation

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d: Y=AB Explanation

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Choose the correct expression for output Y for the circuit shown in the image.

a: Y = AB' Explanation

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b: Y=0 Explanation

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c: Y=1 Explanation

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d: None of these Explanation

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