At a particular time of computation the value of a counting semaphore is 7. Then 20 P operations and 15 V operations were completed on this semaphore. The resulting value of the semaphore is :
(A) 42
(B) 2
(C) 7
(D) 12

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• Consider the following code fragment
  void foo(int x, int y)
  {
  x+=y;
  y+=x;
  }
  main()
  {
  int x=5.5;
  foo(x,x);
  }
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  (A) 5 and 16
  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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  (b) Na > Li > K >Cs 

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  1 year, 5 months ago

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  (B) non-key and non-ordering
  (C) key and ordering
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• What is the number of steps required to derive the string ((() ()) ())

  S → SSS → (S)S → ε

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  (C) 12
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