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>How can access to classes, class variables and methods be controlled?</p>
    </div>
    <div class="ans">
        <p>Access level modifiers determine whether other classes can use a particular field or invoke a particular method in another class. <span class="hi-yl">There are two levels of access control, the top level and the member level.</span></p>
</div>
</div>

<div class="card">
   # Question # 2
    <div class="qtn">
        <p>List the access modifiers in Java?</p>
    </div>
    <div class="ans">
    <p><span class="hi-yl-b">There are four accessibility levels in Java.</span> They are listed below in order of increasing restrictiveness:</p>
<ul>
<li>public</li>
<li>package private</li>
<li>protected</li>
<li>private</li>

</ul>
</div>
</div>

<div class="card">
   # Question # 3
    <div class="qtn">
        <p>What are the top-level access modifiers?</p>
    </div>
    <div class="ans">
        <p>The top-level access modifiers apply to top level classes. <span class="hi-yl-b">Classes can be marked either public or package private</span>.
<ul>
<li><p>A public class is accessible across different packages.</p></li>
<li><p>A package private class is only visible to other classes within the same package.</p></li>
</ul>
<p><span class="hi-yl">All the four access modifiers can be applied at member level.</span></p>
</div>
</div>

<div>
   # Question # 1
    <div>
        <p>How can access to classes, class variables and methods be controlled?</p>
    </div>
    <div>
        <p>Access level modifiers determine whether other classes can use a particular field or invoke a particular method in another class. <span>There are two levels of access control, the top level and the member level.</span></p>
</div>
</div>

<div>
   # Question # 2
    <div>
        <p>List the access modifiers in Java?</p>
    </div>
    <div>
    <p><span>There are four accessibility levels in Java.</span> They are listed below in order of increasing restrictiveness:</p>
<ul>
<li>public</li>
<li>package private</li>
<li>protected</li>
<li>private</li>

</ul>
</div>
</div>

<div>
   # Question # 3
    <div>
        <p>What are the top-level access modifiers?</p>
    </div>
    <div>
        <p>The top-level access modifiers apply to top level classes. <span>Classes can be marked either public or package private</span>.
<ul>
<li><p>A public class is accessible across different packages.</p></li>
<li><p>A package private class is only visible to other classes within the same package.</p></li>
</ul>
<p><span>All the four access modifiers can be applied at member level.</span></p>
</div>
</div>

This lesson discusses the various accessibility levels 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

Accessibility

Question # 1

Question # 2

Question # 3