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

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   # Question # 1
    <div class="qtn">
        <p>What is the <code class="clazz">new</code> keyword used for in Java?</p>
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    <div class="ans">
        <p><span class="hi-yl-b">The new operator instantiates a class by allocating memory for a new object and returning a reference to that memory.</span> The new operator also invokes the object constructor.</p>
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   # Question # 2
    <div class="qtn">
        <p>What is the <code class="clazz">this</code> keyword?</p>
    </div>
    <div class="ans">
        <p><span class="hi-yl-b">Within an instance method or a constructor, <code class="clazz">this</code> is a reference to the current object — the object whose method or constructor is being called.</span> You can refer to any member of the current object from within an instance method or a constructor by using <code class="clazz">this</code>.</p>
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<div>
   # Question # 1
    <div>
        <p>What is the <code>new</code> keyword used for in Java?</p>
    </div>
    <div>
        <p><span>The new operator instantiates a class by allocating memory for a new object and returning a reference to that memory.</span> The new operator also invokes the object constructor.</p>
</div>
</div>

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   # Question # 2
    <div>
        <p>What is the <code>this</code> keyword?</p>
    </div>
    <div>
        <p><span>Within an instance method or a constructor, <code>this</code> is a reference to the current object — the object whose method or constructor is being called.</span> You can refer to any member of the current object from within an instance method or a constructor by using <code>this</code>.</p>
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This lesson discusses different keywords used 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

Keywords

Question # 1

Question # 2