Tag: communication systems

Questions Related to communication systems

SMS and MMS are the features of:

different modes of communication and their uses information technology communication systems physics

  1. Telephone

  2. Mobile

  3. FAX

  4. Television

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Correct Option: B
Explanation:

SMS and MMS can only be sent through mobile phones. so ,they are the exclusive features of mobile.

The device that can be used to send a hardcopy of a document to other places quickly is _________ .

different modes of communication and their uses information technology communication systems physics

  1. Mobile phone

  2. FAX machine

  3. Television

  4. Radio

Show answer
Correct Option: B
Explanation:
FAX Machine is a device that can be used to send a hardcopy of a document to other places quickly .It scans the document through photocells and the data is transmitted over telephone lines to the receiver's FAX machine, where the data is again printed on a paper as a hardcopy of the original.

Mobile consists of a portable microchip called :

different modes of communication and their uses information technology communication systems physics

  1. Subscriber Index Module

  2. Safe Index Meter

  3. Simple Identification Module

  4. Secure Index Model

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Correct Option: A
Explanation:
The SIM(Suscriber Index Module ) card is used in mobile phones , which is used to do all network related communications through it .

At which place our countries first telephone exchange was established?

different modes of communication and their uses information technology communication systems physics

  1. Delhi

  2. Mumbai

  3. Pune

  4. Bangalore

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Correct Option: B
Explanation:
In 1881, the Government later reversed its earlier decision and a licence was granted to the Oriental Telephone Company Limited of England for opening telephone exchanges at Calcutta, Bombay, Madras and Ahmedabad and the first formal telephone service was established in the country.

Printed documents to be transmitted by fax are converted into electrical signals by the process of.

different modes of communication and their uses information technology communication systems physics

  1. Reflection

  2. Scanning

  3. Modulation

  4. Light variation

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Correct Option: B
Explanation:

Fax machine scans a page to make an electronic representation of its text or graphics, compresses the data to save transmission time, and transmits it to another fax machine. The receiving machine decrypts the signal and uses a printer  to make a facsimile of the original page.

The purpose of dividing each frame into two field so as to transmit $50$ views of the picture per second is 

different modes of communication and their uses information technology communication systems physics

  1. To avoid flicker in the picture

  2. The fact that handling of higher frequencies is easier

  3. That $50 Hz$ is the power line frequency in India

  4. To avoid unwanted noises in the signals

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Correct Option: A
Explanation:

This procedure is often applied in interlace scanning which helps to reduce flick (as it involves more number of views in the picture per second ) in the received image without increasing the channel bandwidth.

Which of the following can be sent from one place to another by a Fax machine?

different modes of communication and their uses information technology communication systems physics

  1. Picture

  2. Sound

  3. Picture and Sound

  4. A copy of document

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Correct Option: D
Explanation:

Fax machine makes an exact copy of a document made by electronic scanning and transmitted as data by telecommunications links.

State whether the given statement is true or false :

Modem is used to transmit a data.

different modes of communication and their uses information technology communication systems physics

  1. True

  2. False

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Correct Option: A
Explanation:

True. A modem is a device or program that enables a computer to transmit data over.

The study of control and communications in complex electronic systems and in animals is known as.

different modes of communication and their uses information technology communication systems physics

  1. Cryogenics

  2. Cybernetics

  3. Robotics

  4. Ergonomics

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Correct Option: B

In internet terminology IP means 

different modes of communication and their uses information technology communication systems physics

  1. Internet Provider

  2. Internet Protocol

  3. Internet Procedure

  4. Internet Processor

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Correct Option: B
Explanation:

IP stands for Internet Protocol. The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.

IP has the task of delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers