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ISRO-DEC2017-74

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Consider the function

int func(int num)
{
    int count=0;
    while(num)
    {
        count++;
        num>>=1;
    }
    return(count);
}

For $func(435)$ the value returned is

  1. $9$
  2. $8$
  3. $0$
  4. $10$
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2 Answers

Best answer
5 votes
5 votes

num>>1 is equivalent to num/2

in while loop , value of num will change as follows:

  1.  435 /2 =217  
  2.  217 /2 =108  
  3.  108 /2 =54 
  4.  54 /2 =27
  5.  27 /2 =13 
  6. 13 /2 =6 
  7. 6 /2 =3
  8. 3 /2 =1
  9. 1 /2 =0 

Since it looped 9 times value of count will be 9

Answer is A

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