Which of the following statements is/are true? A digital multiplexer selects…
2023
Which of the following statements is/are true?
A digital multiplexer selects one input from many inputs and outputs the selected one.
Four select lines are required for a 1-to-16 demultiplexer.
Eight OR gates are required to implement an octal-to-binary encoder.
- A.
(i) and (ii)
- B.
(ii) and (iii)
- C.
(i) only
- D.
None of these
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Show answer & explanation
Correct answer: A
Statement (i): True. A multiplexer selects one of many input lines and forwards the selected input to the output.
Statement (ii): True. A 1-to-16 demultiplexer needs 4 select lines because 2^4 = 16.
Statement (iii): False. An octal-to-binary encoder has 8 input lines and produces a 3-bit binary output. It does not require eight output OR gates.
Correct answer: (i) and (ii).