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In the following truth table, V = 1 if and only if the input is valid.

gate-2013-question-6-truth-table - GkSeries

What function does the truth table represent?

A Priority encoder
B Decoder
C Multiplexer
D Demultiplexer

Answer & Explanation

Answer: Option [A]

The function does the truth table represent a 4x2 priority encoder. The priority encoder is a circuit whose input signal is equal to 2N and output signal is N. i.e. if input signal is 8 then the input signal is 3.

In case of two simultaneous inputs the input with highest priority will get precedence.

In this priority encoder the highest priority input signals are to the right and irrelevant are indicated by 'X'. The output V indicates if the input is valid.

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