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Railways PYQCBT 1 2016

RRB NTPC · Question 3

What is the device that converts digital signals into analog signals? A. WiFi B. Modem C. Port D. USB

  1. D

  2. A

  3. B

  4. C

Show answer & explanation

Answer: (C) B

Explanation

A modem (modulator–demodulator) converts a computer's digital signals into analog signals that can travel over telephone or cable lines (modulation), and converts incoming analog signals back to digital (demodulation).