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 inheritance?</p>
    </div>
    <div class="ans">
        <p><span class="hi-yl-b">In object-oriented programming, inheritance enables new objects to take on the properties of existing objects.</span> A class that is used as the basis for inheritance is called a superclass or base class. A class that inherits from a superclass is called a subclass or a derived class.</p>
</div>
</div>

<div class="card">
   # Question # 2
    <div class="qtn">
        <p>What are the benefits of inheritance?</p>
    </div>
    <div class="ans">
        <p>The idea of inheritance is simple but powerful: When you want to create a new class and there is already a class that includes some of the code that you want, you can derive your new class from the existing class. In doing this, you can reuse the fields and methods of the existing class without having to write and debug them yourself. Furthermore, inheritance allows for <span class="hi-yl-b">improved code structuring thus increasing readability and maintainability.</span></p>
<p>In summary <span class="hi-yl">code reusability</span> is the prime benefit of inheritance.</p>
</div>
</div>

<div>
   # Question # 1
    <div>
        <p>What is inheritance?</p>
    </div>
    <div>
        <p><span>In object-oriented programming, inheritance enables new objects to take on the properties of existing objects.</span> A class that is used as the basis for inheritance is called a superclass or base class. A class that inherits from a superclass is called a subclass or a derived class.</p>
</div>
</div>

<div>
   # Question # 2
    <div>
        <p>What are the benefits of inheritance?</p>
    </div>
    <div>
        <p>The idea of inheritance is simple but powerful: When you want to create a new class and there is already a class that includes some of the code that you want, you can derive your new class from the existing class. In doing this, you can reuse the fields and methods of the existing class without having to write and debug them yourself. Furthermore, inheritance allows for <span>improved code structuring thus increasing readability and maintainability.</span></p>
<p>In summary <span>code reusability</span> is the prime benefit of inheritance.</p>
</div>
</div>

This lesson discusses interview questions on inheritance.

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

Inheritance

Question # 1