Computer question from Patwari exam, 2024 by JKSSB
Which of the following devices converts computer output data into an analog form that can be transmitted over a telephone line?
Last updated May 13, 2026
Correct Answer:
Option D —
Modem
A Modem (short for Modulator-Demodulator) is a hardware device that bridges the gap between digital and analog signals.
• Modulation: It converts the digital data from a computer (0s and 1s) into analog signals (waveforms) so they can travel over telephone lines or cable systems.
• Demodulation: At the receiving end, it converts those analog signals back into digital data for the computer to understand.
• Multiplexer (Option A): Combines multiple signals into one signal over a shared medium.
• Modulator (Option B): While modulation is part of the process, the device itself that performs both functions in this context is the Modem.
• Teleport (Option C): This is not a standard networking hardware term in this context.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
