Question

Which of the following statements are true? Please select all that apply.

A) You use the keyword 'throws' to declare exceptions in the method heading.
B) Exceptions are always handled within the method where they occur.
C) Checked exceptions are subclasses of RuntimeException.
D) Unchecked exceptions are checked at compile-time.

Answer 1

Only statement A is true: the keyword 'throws' is used to declare exceptions in a method heading. Statements B, C, and D are false, as exceptions do not have to be handled within the method they occur, checked exceptions aren't subclasses of RuntimeException, and unchecked exceptions are not checked at compile-time.

Step-by-step explanation:

The statement A) You use the keyword 'throws' to declare exceptions in the method heading is true. When you want to indicate that a method might throw an exception, you use the 'throws' keyword in the method declaration. This is typically used for checked exceptions that the caller is expected to handle in some way.

However, statement B) Exceptions are always handled within the method where they occur is false. While it's possible to handle exceptions within the same method they occur using a try-catch block, it's not mandatory. Exceptions can be thrown to the caller of the method, and it can be the caller's responsibility to handle them.

The statement C) Checked exceptions are subclasses of RuntimeException is false. Checked exceptions are not subclasses of RuntimeException; rather, RuntimeException and its subclasses are considered to be unchecked exceptions.

Finally, statement D) Unchecked exceptions are checked at compile-time is also false. Unchecked exceptions, which are subclasses of RuntimeException, are not checked at compile time, but checked exceptions are.