Exception Handling Interview Questions
Mastering Exception Handling: Comprehensive Interview Questions
Exception Handling Interview Questions
Exception handling interview questions typically focus on how you handle unexpected or error situations in your code. You may be asked to explain the different types of exceptions, how you would handle specific exception scenarios, and best practices for writing reliable and robust exception handling code. Employers are looking for candidates who demonstrate a strong understanding of exception handling concepts, can effectively manage errors in their code, and have a proactive approach to handling unexpected situations. Be prepared to discuss your experiences with exception handling in previous projects and how you have solved challenging error scenarios.
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1 - What is an exception in programming?
An exception is an unexpected event that occurs during the execution of a program, disrupting the normal flow of the program. It can be caused by various factors such as user input errors, hardware failures, or network issues.
2) How do you handle exceptions in Java?
Exceptions in Java are handled using try catch blocks. The code that could potentially cause an exception is placed inside the try block, and the catch block is used to catch and handle the exception. Additionally, you can also use finally block to execute code regardless of whether an exception is thrown.
3) What is the difference between checked and unchecked exceptions?
Checked exceptions are checked at compile time, which means the compiler forces you to either handle them or declare them in the method signature using the throws keyword. Unchecked exceptions, on the other hand, do not need to be declared in the method signature and are usually caused by programming errors such as null pointer exceptions.
4) How can you create your custom exception in Java?
To create a custom exception in Java, you need to extend the Exception class or one of its subclasses. You can create your custom exception class with your specific exception message and behavior.
5) What is the purpose of the finally block in exception handling?
The finally block in exception handling is used to execute code that needs to be run regardless of whether an exception is thrown or not. It is typically used to release resources or perform cleanup operations, ensuring that the code is properly executed even in the presence of exceptions.
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