In the following truth table, V = 1 if and only if the input is valid. What…
2013
In the following truth table, V = 1 if and only if the input is valid.
What function does the truth table represent?
Answer: A. Priority encoder — Correct. This truth table defines a priority encoder: X0 and X1 form a two-bit binary code identifying which input line is asserted, and V=1 indicates a valid…
- A.
Priority encoder
- B.
Decoder
- C.
Multiplexer
- D.
Demultiplexer
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Show answer & explanation
Correct answer: A
Correct. This truth table defines a priority encoder: X0 and X1 form a two-bit binary code identifying which input line is asserted, and V=1 indicates a valid input. The don't-care entries show priority behavior (higher-numbered inputs override lower ones): D3 → X0X1 = 1 1; if D3=0 and D2=1 → 1 0; if D3=D2=0 and D1=1 → 0 1; if only D0=1 → 0 0.
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