Q.

A combination of logic gates has the truth table as given below:

PQZ
000
011
101
111

Among the following combinations, the one that has the truth table shown above is

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a

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b

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c

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d

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answer is C.

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Detailed Solution

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The boolean expression of this arrangement is,

For NOR gate

Y1=P+Q¯

For NOT gate

Y2=Q¯

For NAND gate

Z=Q¯·(P+Q¯)¯

Truth Table

PQZ
000
011
101
111
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