Java Control Statements

Java Control Statements - Important Points

1.		Which control flow statement is used to exit from a loop?

A. continue

B. break

C. return

D. exit

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Answer: option b

Explanation:

The break statement is used to exit from a loop before its normal termination.

2.		What is the difference between a while loop and a do-while loop in Java?

A. A while loop runs at least once, while a do-while loop may not run at all.

B. A while loop always runs exactly once, while a do-while loop may run more than once.

C. A while loop tests its condition at the beginning of the loop, while a do-while loop tests its condition at the end of the loop.

D. A while loop is used for iterating over arrays, while a do-while loop is used for iterating over collections.

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Answer: option c

Explanation:

The difference between a while loop and a do-while loop is the order in which their conditions are tested. A while loop tests its condition at the beginning of the loop, and if the condition is false, the loop never runs. A do-while loop tests its condition at the end of the loop, and therefore always runs at least once.

3.		Which of the following is not a valid loop control statement in Java?

A. continue

B. break

C. return

D. goto

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Answer: option d

Explanation:

The goto statement is not a valid loop control statement in Java.

4.		Which control flow statement is used to skip the remaining statements in the current iteration of a loop and move on to the next iteration?

A. continue

B. break

C. return

D. skip

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Answer: option a

Explanation:

The continue statement is used to skip the remaining statements in the current iteration of a loop and move on to the next iteration.

5.		Which of the following statements is true about nested loops in Java?

A. Nested loops can only be used with for loops, not with while or do-while loops.

B. A break statement inside a nested loop terminates only the innermost loop.

C. A continue statement inside a nested loop skips only the innermost loop.

D. Nested loops are never used in real-world programming.

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Answer: option b

Explanation:

A break statement inside a nested loop terminates only the innermost loop, while a continue statement skips only the current iteration of the innermost loop. Nested loops are often used in real-world programming for tasks such as searching and sorting.

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