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>Explain the concept of class in Java?</p>
    </div>
    <div class="ans">
        <p>A class in object orientated languages is the fundamental building block of any program. It can be thought of as a blueprint and its instance objects as manifestations of that blueprint. <span class="hi-yl-b">A class, in the context of Java, are templates that are used to create objects, and to define object data types and methods. Except for primitive types (int, double, float, char etc), all objects (String, Lists, Runnable, etc) in Java are instances of a class.</span></p>
    </div>
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<div>
   # Question # 1
    <div>
        <p>Explain the concept of class in Java?</p>
    </div>
    <div>
        <p>A class in object orientated languages is the fundamental building block of any program. It can be thought of as a blueprint and its instance objects as manifestations of that blueprint. <span>A class, in the context of Java, are templates that are used to create objects, and to define object data types and methods. Except for primitive types (int, double, float, char etc), all objects (String, Lists, Runnable, etc) in Java are instances of a class.</span></p>
    </div>
</div>

This lesson discusses the concept of classes in Java and related questions around them.

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

Classes

Question # 1