UGC-NET | UGC NET CS 2018 Dec – II | Question 70

What does the following java function perform ? (Assume int occupies four bytes of storage)

Public static int f(int a) {
  //Pre-conditions : a>0 and no overflow/underflow occurs
  int b = 0;
  for (int i = 0; i < 32; i++) {
    b = b << 1;
    b = b | (a & 1);
    a = a >>> 1; // This is a logical shift
  }
  Return b;
}

(A) Return the int that represents the number of 0’s in the binary representation of integer a.
(B) Return the int that represents the number of 1’s in the binary representation of integer a.
(C) Return the int that has the reversed binary representation of integer a.
(D) Return the int that has the binary representation of integer a.


Answer: (C)

Explanation:

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