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Question

The output of a logic gate is 1 when all its inputs are at logic 'O'. The gate is either

A
NAND or an EX-OR gate
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B
a NOR or an EX-NOR gate
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C
a OR or an EX-NOR gate
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D
a AND or an EX-OR gate
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Solution

The correct option is C a NOR or an EX-NOR gate

The output of a logic gate is ′1′′1′ when all its inputs are at logic 'O'. The gate is either

a NOR or an EX-NOR gate:-

The output of a logic gate is ′1′′1′ when all its inputs are at logic 'O'. The gate is either

Ex-NOR Function Realisation using NAND gates. As the Ex-NOR gate gives an output of logic level “1” whenever its two inputs are equal it can be used to compare the magnitude of two binary digits or numbers and so Ex-NOR gates are used in Digital Comparator circuits.







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