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Java Control Statements

Java Control Statements - Important Points


6. Which control flow statement is used to execute a set of statements at least once?

A. while loop

B. do-while loop

C. for loop

D. if statement

Discuss Work Space

Answer: option b

Explanation:

The do-while loop is used to execute a set of statements at least once, since the condition is tested at the end of the loop.

7. Which of the following is not a valid relational operator in Java?

A. ==

B. !=

C. <=

D. ><

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Answer: option d

Explanation:

The >< operator is not a valid relational operator in Java.

8. What is the difference between a switch statement and a series of if-else statements in Java?

A. A switch statement can only test for equality, while if-else statements can test for any condition.

B. A switch statement can test for any condition, while if-else statements can only test for equality.

C. A switch statement is more efficient than a series of if-else statements for testing a single variable against multiple values.

D. There is no difference between a switch statement and a series of if-else statements.

Discuss Work Space

Answer: option c

Explanation:

A switch statement is more efficient than a series of if-else statements for testing a single variable against multiple values, since the switch statement can generate a jump table at compile time.

9. Which control flow statement is used to jump to a specific label in the code?

A. continue

B. break

C. return

D. goto

Discuss Work Space

Answer: option d

Explanation:

The goto statement is used to jump to a specific label in the code. Note: The goto statement is not used in modern Java programming, and its use is discouraged due to its potential to create unreadable and unmaintainable code.

10. What is the purpose of the labeled statement in Java?

A. To define a new variable in the code.

B. To provide a descriptive name for a loop or if statement.

C. To mark a specific point in the code that can be jumped to using the goto statement.

D. To create a custom exception class.

Discuss Work Space

Answer: option c

Explanation:

A labeled statement in Java is a statement that is preceded by a label and can be jumped to using the goto statement.


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