The ultimate guide to Java interviews with 300+ real-world questions and answers. Get interview-ready in just a few hours with strategies developed by FAANG engineers.

It’s very common to have interviews testing your knowledge of a programming language you claim to be an expert in.

If you've got an interview coming up on Java soon and need to get up to speed, this is the ideal course for you. You'll refresh your memory on everything from the basics to more advanced functionality you’re likely to be asked about. Even if you're using Java every day, you may not have been exposed to parts of it in some time, so it's always useful to make sure you're updated.

This course features more than 300 of the most commonly asked core Java interview questions that you're likely to face as an experienced software engineer. You'll get to explore questions by topic, as well as see detailed answers for each one, and plenty of live code examples where relevant. Get started today.

The Java Interview Handbook: 300+ Interview Questions

<div class="card">
   # Question # 1
    <div class="qtn">
        <p>What is an exception?</p>
    </div>
    <div class="ans">
        <p><span class="hi-yl-b">An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions. The term exception is shorthand for the phrase "exceptional event."</span> Using exceptions helps us:</p>
<ul>
<li><p>Separate out error handling code from rest of the code</p></li>
<li><p>Errors can be propagated up the call stack and only handled by interested methods</p></li>
<li><p>Errors can be grouped and organized in hierarchy. For instance the <code class="clazz">java.io.IOException</code> is the most general exception for input/output errors. A method can choose to catch and handle this broad category of errors or a much narrower and specific exception such as <code class="clazz">java.io.FileNotFoundException</code></</p></li>
</ul>

</div>
</div>


<div>
   # Question # 1
    <div>
        <p>What is an exception?</p>
    </div>
    <div>
        <p><span>An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions. The term exception is shorthand for the phrase "exceptional event."</span> Using exceptions helps us:</p>
<ul>
<li><p>Separate out error handling code from rest of the code</p></li>
<li><p>Errors can be propagated up the call stack and only handled by interested methods</p></li>
<li><p>Errors can be grouped and organized in hierarchy. For instance the <code>java.io.IOException</code> is the most general exception for input/output errors. A method can choose to catch and handle this broad category of errors or a much narrower and specific exception such as <code>java.io.FileNotFoundException</code></</p></li>
</ul>

</div>
</div>


This lesson introduces the concept of exceptions in Java.

Java Ecosystem

Methods

Classes

Interfaces

Inheritance

Lambda Expressions

Generics

Multi-Threading

Memory Management

Collections

Exceptions

Reflection

Serialization

Miscellaneous Topics

Java in Practice

Patterns

The End

Exceptions

Question # 1