UGC NET COMPUTER SCIENCE SOLVED PAPERS 2014-16 - UGC NET Computer Science Paper 2 December 2015

46. Which of the following is not a software process model?

  • Option : D
  • Explanation :
    Prototyping, iterative, are well known software process model. In time boxing model, development is done iteratively as in the iterative enhancement model but in time boxing model, each iteration is done in a timebox of fixed duration. Glass boxing model is a software testing pattern. So, option (D) is correct
Cancel reply
Cancel reply

47. How many solutions are there for the equation x + y + z + u = 29 subject to the constraints that x ≥ 1, y ≥ 2, z ≥ 3 and u ≥ 0?

  • Option : B
  • Explanation :
    x ≥ 1, y ≥ 2, z ≥ 3, we have to subtract these constraints from total number of choices: i.e. 29-(1+2+3+0) = 23 (23 + 4 - 1)C23 = 2600 So, option (B) is correct.
Cancel reply
Cancel reply

48. A unix file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contain 10 direct entries and one single, double and triple indirect entry each?

  • Option : C
  • Explanation :
    block = 210
    block pointer size = 4B
    entries possible in block = 210/22 = 256
    direct pointer gives = 10 * 256 = 10 blocks
    single indirect gives = 256 * 256 = 28 blocks
    double indirect gives = 256 * 256 * 256 = 216 blocks
    triple indirect gives = 256 * 256 * 256 * 256 = 224 blocks
    total = 10 blocks + 28 blocks + 216 blocks + 224 blocks
    = 16843018 blocks = 16843018 * 1024 = 17247250432 ≈ 16 GB
Cancel reply
Cancel reply

49. __________ uses electronic means to transfer funds directly from one account to another rather than by cheque or cash

  • Option : B
  • Explanation :
    E-banking uses electronic means to transfer funds directly from one account to another rather than by cheque or cash. E-banking is faster then other modes of banking and it saves time as well as resources. It is much safer then cash and cheque and payment gateway is present on the same platform where the market place available. In this mode merchant and bank have their own agreement of privacy and transaction rates. So, option (B) is correct.
Cancel reply
Cancel reply

50. The inorder traversal of the following tree is:

  • Option : D
  • Explanation :
    In inorder traversal first we traverse left node then root node and then right node: In the following tree

    we first go to the leftmost node then its root after that right i.e. 2 4 3 13 7 6 15 17 20 18 18. In rest of the option inorder property is violating. So, option (D) is correct.
Cancel reply
Cancel reply