NIELIT 2017 July Scientist B (IT) - Section B: 50

Question

Which one of the following is the function of a multiplexer?

• A. To decode information
• B. To select $1$ out of $N$ input data sources and to transmit it to single channel
• C. To transmit data on $N$ lines
• D. To perform serial to parallel conversion

Answer 1

In electronics, a multiplexer (or mux; spelled sometimes as multiplexor), also known as a data selector, is a device that selects between several analog or digital input signals and forwards it to a single output line.

B is correct.

Ref: https://en.wikipedia.org/wiki/Multiplexer

Answer 2

Multiplexer is a device that combines the signals of two or more incoming lines onto a single outgoing line. A basic example of multiplexing is a telephone line, which carries many individual calls at the same time, with each call added to the line through multiplexing. Although most commonly associated with computing and communications, multiplexers have a variety of other applications.

B is the answer

Answer 3

In electronics, a multiplexer (or mux; spelled sometimes as multiplexor), also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed a separate set of digital inputs known as select lines.

option B is answer..