Java OCA OCP Practice Question 1113

Question

What is the result of the following? 

int count = 10; 
List<Character> chars = new ArrayList<>(); 
do { 
   chars.add('a'); 
   for (Character x : chars) 
      count -=1; 
} while (count > 0); 
System.out.println(chars.size());
  • A. 3
  • B. 4
  • C. The code does not compile.
  • D. None of the above 


B.

Note

On the first iteration through the outer loop, chars becomes 1 element.

The inner loop is run once and count becomes 9.

On the second iteration through the outer loop, chars becomes 2 elements.

The inner loop runs twice so count becomes 7.

On the third iteration through the outer loop, chars becomes 3 elements.

The inner loop runs three times so count becomes 4.

On the fourth iteration through the outer loop, chars becomes 4 elements.

The inner loop runs four times so count becomes 0.

Then both loops end.

Option B is correct.




PreviousNext

Related