Java Programming for Complete Beginners - Java 16 - Step 08 - Hierarchy of Errors and Exceptions - Checked and Runtime

The video tutorial explains the concept of exception handling in Java, focusing on the exception hierarchy. It introduces the superclass Throwable and its subclasses Error and Exception. Errors are issues that cannot be handled by programmers, such as out-of-memory errors. Exceptions, however, can be managed and are divided into runtime exceptions and checked exceptions. Runtime exceptions do not require explicit handling, while checked exceptions must be handled or declared to be thrown. The tutorial emphasizes understanding the exception hierarchy to effectively manage exceptions in Java programming.

What is the main difference between runtime exceptions and checked exceptions in Java?

• Checked exceptions are ignored by the Java compiler.

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

• Checked exceptions do not require handling by the calling method.

• Runtime exceptions must be handled by the calling method.

Which class is at the top of the exception hierarchy in Java?

• RuntimeException

• Throwable

• Error

• Exception

What is a characteristic of errors in Java?

• They are a subclass of RuntimeException.

• They are a type of checked exception.

• They are beyond the programmer's control.

• They can be handled by the programmer.

Which of the following is a checked exception?

• InterruptedException

• ArrayIndexOutOfBoundsException

• ArithmeticException

• NullPointerException

What must a method do if it throws a checked exception?

• Ignore it.

• Log it and continue execution.

• Handle it or declare it in the method signature.

• Convert it to a runtime exception.