Which of the following is an exit-controlled loop?

1. for
2. do-while
3. while
4. None of these

Which of the following is an invalid loop?

1. repeat
2. while
3. do-while
4. for

Which of the following is an empty loop?

1. for(i = 0; i < 5; i++);
2. while (i < 5) i++;
3. do {i++;} while (i < 5);
4. All of these

Which of the following is not a jump statement in Java?

1. return
2. jump
3. break
4. continue