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In the following truth table, V = 1 if and only if the input is valid. What function does the truth table represent?

1. Priority encoder
2. Decoder
3. Multiplexer
4. Demultiplexer

Correct answer: Priority encoder

Solution

The truth table represents a priority encoder because it outputs a binary code corresponding to the highest-priority active input, indicating which input is valid. This function is distinct from decoders, multiplexers, and demultiplexers, which serve different roles in digital logic.

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