UGC NET COMPUTER SCIENCE SOLVED PAPERS 2014-16 - UGC NET Computer Science Paper 3 July 2016

21. Which of the following is false regarding the evaluation of computer programming languages ?

  • Option : D
  • Explanation :
    Efficiency and Readability, Application oriented features and Software development are regarding to the evaluation of computer programming languages. But Hardware maintenance costis not regrading to the evaluation of computer programming languages. So, option (D) is correct.
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23. The regular expression for the complement of the language L = {anbm|n ≥ 4, m ≤ 3} is:

  • Option : D
  • Explanation :
    The complement of the language L = {anbm|n ≥ 4, m ≤ 3} is L` = {anbm|n < 4} U {anbm|m > 3}: L` = Universal set - L. L` = Universal set - {anbm|n ≥ 4, m ≤ 3} = (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)* ba(a + b)* Option (D) is giving freedom on constraints on number of a's and number of b's. So, option (D) is correct.
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24. Consider the following two languages : L1 = {0i1j| gcd (i, j) = 1} L2 is any subset of 0*. Which of the following is correct ?

  • Option : B
  • Explanation :
    L1 = {0i1j| gcd (i, j) = 1}: There are infinite pair having gcd 1. We can't design FA for such language. That's why L1 is not regular. L2 is any subset of 0*, we can construct FA for any subset of single alphabet. That's why L2 is regular. So, option (B) is correct.
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25. If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ______.

  • Option : C
  • Explanation :
    Transmission rate = frame rate * no of bits in a slot. Frame rate = 4000 frames per second # of bits in a slot = 8 bit TDM = 4000 * 8 bps = 32 Kbps. So, option (C) is correct.
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