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 a package?</p>
    </div>
    <div class="ans">
        <p><span class="hi-yl-b">A package is a grouping of related types providing access protection and name space management.</span> For instance fundamental Java classes are in <code class="abtc">java.lang</code>, classes for input and output are in <code class="abtc">java.io</code>. A package can contain classes, interfaces, enumerations, and annotation types. Packages in the Java language begin with <code class="abtc">java.*</code> or <code class="abtc">javax.*</code>. We usually put related classes in packages for the following reasons:</p>
<ul>
<li><p>other programmers can easily determine that types in a package are related and work cooperatively to provide a certain functionality</p></li>
<li><p>names of your types won't conflict with the type names in other packages because the package creates a new namespace</p></li>
<li><p>allow types within the package to have unrestricted access to one another yet still restrict access for types outside the package</p></li>
</ul>

</div>
</div>


<div>
   # Question # 1
    <div>
        <p>What is a package?</p>
    </div>
    <div>
        <p><span>A package is a grouping of related types providing access protection and name space management.</span> For instance fundamental Java classes are in <code>java.lang</code>, classes for input and output are in <code>java.io</code>. A package can contain classes, interfaces, enumerations, and annotation types. Packages in the Java language begin with <code>java.*</code> or <code>javax.*</code>. We usually put related classes in packages for the following reasons:</p>
<ul>
<li><p>other programmers can easily determine that types in a package are related and work cooperatively to provide a certain functionality</p></li>
<li><p>names of your types won't conflict with the type names in other packages because the package creates a new namespace</p></li>
<li><p>allow types within the package to have unrestricted access to one another yet still restrict access for types outside the package</p></li>
</ul>

</div>
</div>


Questions on the concept of package 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

Package

Question # 1