Question

A loop is a repetitive construct used to repeat execution of a block of statements. The for and while loops will not execute even once, if the condition is false in the beginning. The number of iterations in a loop can be determined by the number of repetitions made till the given condition is true. The condition is checked in the beginning and at the end of while and do-while loops, respectively. 

Based on the above discussions, answer the following questions:

1. Which of the following is an exit controlled loop?
   1. for loop
   2. while loop
   3. do-while
   4. all of the above
2. In the given snippet, how many time the iterations of the loop will take place?
   

   int n = 1000;
   while (n > 10)
   n = n / 10;

   
   
   1. 1 time
   2. 0 time
   3. 2 times
   4. 3 times
3. Which one of the following loops will not be executed even once?
   1. for (k = 1; k <= 100; k++ );
   2. for (k = 10; k < 1; k++ );
   3. for (k = 1; k >= 1; k++ );
   4. for (k = 0; k < 10, k++ );
4. Predict the output when the following program snippet is executed?
   

   int n = 1000; 
   do 
     n = n / 10; 
   while (n > 10);
   System.out.println(n); 

   1. 1
   2. 100
   3. 10
   4. 0

Answer 1

1. iii. do-while loop
2. iii. 2 times
3. iii. for (k = 10; k < 1; k++ );
4. iii. 10