Java Interview Guide : 200+ Interview Questions and Answers - Throwing an Exception

The video tutorial explains the concept of exceptions in programming, focusing on the difference between runtime and checked exceptions. It uses a currency conversion example to illustrate when to throw exceptions. The tutorial details how to handle checked exceptions using 'throws' and 'try-catch' blocks, and emphasizes the importance of proper error handling to avoid compilation errors.

What is the primary reason for throwing an exception in the given example?

• To address currency mismatch

• To manage different data types

• To add two amounts

• To handle currency conversion

What is a characteristic of unchecked exceptions?

• They always cause a compiler error

• They must be declared in the method signature

• They require a try-catch block

• They do not need to be handled by the calling method

What happens if you change a runtime exception to a checked exception without handling it?

• The program automatically handles it

• A compiler error occurs

• The program runs smoothly

• The exception is ignored

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

• Ignore the exception

• Declare it in the method signature

• Automatically handle it

• Convert it to an unchecked exception

What are the two options for handling a checked exception in the calling method?

• Log it or convert it to a runtime exception

• Convert it to a runtime exception or ignore it

• Throw it or handle it with a try-catch block

• Ignore it or log it

Why is it not a good practice to use System.out.println for handling exceptions?

• It requires additional libraries

• It does not provide a stack trace

• It is too complex

• It automatically logs the exception

What is the main difference between checked and unchecked exceptions?

• Unchecked exceptions always cause a program crash

• Unchecked exceptions must be declared in the method signature

• Checked exceptions require handling or declaration, while unchecked do not

• Checked exceptions are ignored by the compiler