UGC NET COMPUTER SCIENCE SOLVED PAPERS 2017-19 - UGC NET Computer Science November 2017 Paper 2

31. Which of the following regular expressions, each describing a language of binary numbers (MSB to LSB) that represents non-negative decimal values, does not include even values ?

  • Option : C
  • Explanation :
    Regular expression for binary numbers that represents non negative odd numbers: It's LSB must be 1. So (C) option is correct.
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33. Match the description of several parts of a classic optimizing compiler in List - I, with the names of those parts in List - II:

  • Option : A
  • Explanation :

    Parser is a part of compiler and responsible for syntax recognition. Scanner (or tokenization) used by lexical analyzer. In Semantic analysis consistency and definition of syntax is checked. An optimizer is used improve the IR program. So option (A) is correct.

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34. In Distributed system, the capacity of a system to adapt the increased service load is called

  • Option : B
  • Explanation :
    Scalability is the capacity of distributed system to adopt the increased load.
    So, option (B) is correct
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35. In __________ disk scheduling algorithm, the disk head moves from one end to other end of the disk, serving the requests along the way. When the head reaches the other end, it immediately returns to the beginning of the disk without serving any requests on the return trip.

  • Option : D
  • Explanation :
    In C-SCAN disk scheduling algorithm, the disk head serve the request from one end to other end but when it reaches to other end it immediately returns to the starting of the disk without serving any request.
    So option (D) is correct.
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