Java Interview Guide : 200+ Interview Questions and Answers - Checked and Unchecked Exceptions

This video tutorial explains the hierarchy of exception handling classes in Java, focusing on the distinction between errors and exceptions. Errors are issues that cannot be handled by the programmer, such as out of memory errors. Exceptions, on the other hand, can be managed by the programmer and are divided into checked and unchecked exceptions. Checked exceptions require the calling method to handle them, while unchecked exceptions do not. The video also covers the runtime exception hierarchy and how to create checked exceptions.

What is the topmost class in the exception handling hierarchy in Java?

• Error

• Exception

• Throwable

• RuntimeException

Which type of exception must be handled or declared in the method signature?

• Runtime Exception

• Checked Exception

• Unchecked Exception

• Error

What is the main characteristic of unchecked exceptions?

• They are not required to be handled by the calling method.

• They must be handled by the calling method.

• They are errors that cannot be managed.

• They are always related to file operations.

Which class do unchecked exceptions extend?

• Exception

• Error

• RuntimeException

• Throwable

How can a programmer create a checked exception?

• By extending Exception directly

• By extending Throwable

• By extending RuntimeException

• By extending Error

What is the key difference between errors and exceptions?

• Exceptions are always related to memory issues.

• Exceptions cannot be handled by the programmer.

• Errors can be handled by the programmer.

• Errors are unmanageable by the programmer.

Which of the following is an example of an error?

• FileNotFoundException

• NullPointerException

• OutOfMemoryError

• IOException