Computer practice question for SSC. Select an option to check your answer, read the explanation and continue practicing.
Which of the following is used to receive and send computer files over telephone lines?
Correct Answerसही उत्तर
A. ModemA. मॉडेम
Explanationव्याख्या
The correct answer is Modem.
According to the source, Modem stands for Modulator Demodulator and is a hardware component that allows a computer or another device such as a router or switch to connect to the Internet.
The book explains that a modem converts or 'modulates' an analog signal coming from a telephone or cable wire into digital data that a computer can recognise.
It similarly converts digital data from a computer or other device into an analog signal that can be transmitted over standard telephone lines.
Therefore the complete source-supported revision chain is: Modem — Modulator Demodulator — Hardware Component — Analog to Digital Conversion — Digital to Analog Conversion — Telephone
Cable Lines — Internet Connection — sending and receiving data.
MICR Device, Floppy Disk and Light Pen are distractors.
Students should connect the two directions of conversion with the name Modulator-Demodulator.
The source does not discuss modem speed, baud rate, dial-up technology, DSL, cable standards or wireless modems.
Therefore those details have not been added.
Quick revision: Modem = Modulator Demodulator = Digital ↔ Analog conversion for communication over telephone
cable lines.
Therefore option (a), Modem, is correct.
सही उत्तर Modem है। स्रोत के अनुसार Modem का full form Modulator Demodulator है और यह एक hardware component है जो computer या router/switch जैसे device को Internet से connect करने में मदद करता है। Book बताती है कि modem telephone या cable wire से आने वाले analog signal को modulate/convert करके digital data में बदलता है जिसे computer पहचान सकता है। इसी प्रकार यह computer के digital data को analog signal में convert करता है जिसे standard telephone lines पर भेजा जा सके। इसलिए complete source-supported revision chain है: Modem — Modulator Demodulator — Hardware Component — Analog → Digital — Digital → Analog — Telephone/Cable Line Communication — Internet Connection। MICR Device, Floppy Disk और Light Pen distractors हैं। Modulator-Demodulator नाम को दोनों directions की conversion के साथ याद करना useful है। Source modem speed, baud rate, dial-up, DSL, cable standard या wireless modem की details नहीं देती। इसलिए outside technical facts add नहीं किए गए हैं। Quick revision: Modem = Modulator Demodulator = Digital ↔ Analog Conversion over Telephone/Cable Lines। इसलिए विकल्प (a), Modem, सही उत्तर है।
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