UGC NET COMPUTER SCIENCE SOLVED PAPERS 2017-19 - UGC NET Computer Science November 2017 Paper 3

72. The Sigmoid activation function f(t) is defined as:

  • Option : C
  • Explanation :
    The Sigmoid activation function f(t) is defined as: Nov2017 cs
    So, option (C) is correct.
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73. Consider the following statements :
(a) UNIX provides three types of permissions * Read * Write * Execute
(b) UNIX provides three sets of permissions * permission for owner * permission for group * permission for others
Which of the above statement/s is/are true ?

  • Option : C
  • Explanation :
    UNIX provides Read, Write and Execute permisision on files UNIX provides three sets of permissions
  • permission for owner
  • permission for group
  • permission for others

  •  Both (a) and (b) are coreect. So, option (C) is correct.
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74. Which of the following routing technique / techniques is / are used in distributed systems?
(a) Fixed Routing
(b) Virtual Routing
(c) Dynamic Routing

  • Option : A
  • Explanation :
    Distributed system uses fixed routing technique. Dynamic and virtual routing are not used is distributed system.
    So, option (A) is correct.
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75. Match the following WINDOWS system calls and UNIX system calls with reference to process control and File manipulation.

Windows UNIX
(a)    Create - process ()  (i)    Open()
(b)    WaitForSingleObject ()  (ii)    Close()
(c)    CreateFile ()      (iii)   Fork()
(d)    CloseHandle ()  (iv)   Wait()
 Code:
 (a)(b)(c)(d)
(1)(iii)(iv)(i)(ii)
(2)(iv)(iii)(i)(ii)
(3)(iv)(iii)(ii)(i)
(4)(iii)(iv)(i)(ii)

  • Option : A
  • Explanation :
    1. In UNIX Wait() is used to WaitForSingleObject().
    2. In UNIX Fork() is used for create-process().
    3. In UNIX Create() is used for CreateFile().
    4. In UNIX Close() is used for CloseHandle()
    So, option (A) is correct.
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