How do you handle exceptions in Java interview questions?

How do you handle exceptions in Java interview questions?

21. Java Exception Handling Best Practices

1. Clean up resources in a finally block or use a try-with-resources statement.
2. Throw a specific exception.
3. Do not catch the Exception class rather catch specific subclasses.
4. Never catch a Throwable class.

What is the core advantage of exception handling in Java?

The core advantage of exception handling is to maintain the normal flow of the application. An exception normally disrupts the normal flow of the application; that is why we need to handle exceptions.

What is a Java way to convey both system and programming error?

In simple word Exception is Java’s way to convey both system and programming errors. In Java Exception feature is implemented by using class like Throwable, Exception, RuntimeException and keywords like throw, throws, try, catch and finally.

Can exception handling resolve exceptions?

Exception handling enables programmers to write robust and fault-tolerant programs. Exception handling can catch but not resolve exceptions. 11.2 Q1: When an exception occurs it is said to have been ________.

Does a try block need a catch block?

The try block contains set of statements where an exception can occur. A try block is always followed by a catch block, which handles the exception that occurs in associated try block. A try block must be followed by catch blocks or finally block or both.

What are the 5 keywords in Java exception handling?

Customized Exception Handling : Java exception handling is managed via five keywords: try, catch, throw, throws, and finally.

Why do we need exception handling?

Exception handling ensures that the flow of the program doesn’t break when an exception occurs. For example, if a program has bunch of statements and an exception occurs mid way after executing certain statements then the statements after the exception will not execute and the program will terminate abruptly.

Which exceptions should be explicitly handled?

The differences between checked and unchecked exceptions are: Checked exceptions must be explicitly caught or propagated as described in Basic try-catch-finally Exception Handling. Unchecked exceptions do not have this requirement. They don’t have to be caught or declared thrown.

How do you handle exceptions in Java without try catch?

throws: Throws keyword is used for exception handling without try & catch block. It specifies the exceptions that a method can throw to the caller and does not handle itself.

What are the different ways to handle exceptions?

Here are the 9 most important ones that help you get started or improve your exception handling.

1. Clean Up Resources in a Finally Block or Use a Try-With-Resource Statement.
2. Prefer Specific Exceptions.
3. Document the Exceptions You Specify.
4. Throw Exceptions With Descriptive Messages.
5. Catch the Most Specific Exception First.

What are the keywords for handling exceptions in Java?

There are 5 keywords that are used for handling exceptions, namely – try: it is used to enclose the code that may throw an exception. The try block should always be inside the method. catch: it is used to handle the exception. This block is always written down after the try block.

What happens if Java exception handler is too broad?

Exception handlers that are too broad can make your code more error-prone, catch exceptions that weren’t anticipated, and cause unexpected behavior in your program. The second way is implementing multiple catch blocks:

What happens when exception is handled in method?

When exception is handled in a method, the calling methods will not need worry about that exception. Since Exception Handling is added in the method method2, the exception did not propogate to method1 i.e. method1 does not know about the exception in method2. Few important things to remember from this example.

Which is the most important part of exception handling?

The important part in exception handling is the try – catch block. Look at the example below. When exception is handled in a method, the calling methods will not need worry about that exception.