UGC NET COMPUTER SCIENCE SOLVED PAPERS 2014-16 - UGC NET Computer Science Paper 2 August 2016

26. Which of the following statements is not true with respect to microwaves?

  • Option : A
  • Explanation :
    Electromagnetic waves with frequencies not ranges from 300 GHz to 400 THz. It ranges from (0.3 to 300) GHz. So, I option is Incorrect. Propagation is line-of-sight.Correct Very high-frequency waves cannot penetrate walls.Correct Use of certain portions of the band requires permission from authorities.Correct So, option (A) is correct.
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27. In a fast Ethernet cabling, 100 Base-TX uses ____ cable and maximum segment size is _____.

  • Option : A
  • Explanation :
    100 Base TX, Fast Ethernet, transmits data at 100 Mbps. Segment size is 100 meter and it uses twisted pair cable. Base stands for baseband. So, option (A) is correct.
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28. A network with bandwidth of 10 Mbps can pass only an average of 12,000 frames per minute with each frame carrying an average of 10,000 bits. What is the throughput of this network ?

  • Option : B
  • Explanation :
    Throughput is amount of data moved successfully from one place to another place. i.e. 12,000 frames per minute. Each Frame is carrying 10,000 bits So, 12,000 * 10,000 / 60 seconds. = 2 * 1000000 bits / seconds. = 2 Mbps. So, option (B) is correct.
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29. Match the following

List - IList - II
a. Session layeri. Virtual terminal software
b. Application layerii. Semantics of the information transmitted
c. Presentation layeriii. Flow control
d. Transport layeriv. Manage dialogue control

Codes:

 abcd
(1)iviiiiii
(2)iiviiiii
(3)iviiiiii
(4)iviiiiii

  • Option : A
  • Explanation :
  • Session layer manages dialogue control.
  • Virtual terminal software is a application layer software.
  • Semantics of the information transmitted through presentation layer.
  • Transport layer manages flow control.
  • So, option (A) is correct.
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30. Which of the following protocols is used by email server to maintain a central repository that can be accessed from any machine ?

  • Option : B
  • Explanation :
  • POP3 is post office protocol Version 3.POP is a protocol which listens on port 110 and is responsible for accessing the mail service on a client machine. POP3 works in two modes such as Delete Mode and Keep Mode.
  • IMAP is Internet Messaged Access Protocol which is used by email server to maintain a central repository that can be accessed from any machine.
  • SMTP is simple mail transfer protocol.
  • DMSP is distributed mail service protocol.
  • So, option (B) is correct.
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