Computer Science - Class 12
Solutions to CBSE Sample Paper - Computer Science Class 12

Fill in the blank:

The modem at the sender’s computer end acts as a ____________.

a. Model

b. Modulator

c. Demodulator

d. Convertor


Answer by student:

b. Modulator

Detailed answer by teachoo:

Let’s go through each of the options and see why they are correct or incorrect:

  • a. Model: This is incorrect because a model is not related to a modem or its function. A model is a representation or imitation of something, such as a physical object, a system, or a process.
  • b. Modulator: This is correct because a modulator is one of the functions of a modem. A modem acts as a modulator when it converts the digital signal from the sender’s computer into an analog signal that can be transmitted over the internet.
  • c. Demodulator: This is incorrect because a demodulator is not the function of a modem at the sender’s computer end. A modem acts as a demodulator when it converts the analog signal from the internet into a digital signal that can be received by the receiver’s computer.
  • d. Convertor: This is incorrect because a convertor is too vague and general to describe the function of a modem. A convertor is any device that changes one form of energy or data into another. A modem is a specific type of convertor that modulates and demodulates signals between digital and analog forms.

So, the correct answer is b. Modulator.

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.