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Home / Interview Subjects / Java Exception Handling
WithoutBook LIVE Mock Interviews Java Exception Handling Related interview subjects: 39

Interview Questions and Answers

Know the top Java Exception Handling interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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The Best LIVE Mock Interview - You should go through before interview

Know the top Java Exception Handling interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

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Freshers / Beginner level questions & answers

Ques 1

What is an exception in Java?

An exception is an event that disrupts the normal flow of the program's instructions during runtime.

Example:

int result = 10 / 0; // This will throw an ArithmeticException
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Ques 5

What is the purpose of the 'NullPointerException' in Java?

The 'NullPointerException' is thrown when attempting to access or modify an object reference that is null.

Example:

String str = null;
int length = str.length(); // This will throw NullPointerException
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Ques 6

What is the purpose of the 'try' block?

The 'try' block is used to enclose a block of code where exceptions might occur.

Example:

try { /* code that may throw exceptions */ } catch (Exception e) { /* handle exception */ }
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Ques 10

How do you handle custom exceptions in a try-catch block?

You can catch custom exceptions like any other exception by specifying the custom exception type in the catch block.

Example:

try { /* code */ } catch (CustomException ce) { /* handle custom exception */ }
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Ques 11

What is the purpose of the 'FileNotFoundException' in Java?

'FileNotFoundException' is thrown when an attempt to open the file denoted by a specified pathname has failed.

Example:

try { FileReader fr = new FileReader("nonexistent.txt"); } 
catch (FileNotFoundException e) { /* handle file not found exception */ }
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