• Packt logo
  • FutureLearn logo

Interview Preparation for Java Developers

Explore key Java questions and answers to gain the knowledge and confidence to succeed in a Java interview.

Over the shoulder view of businesswoman interviewing two java developers, which a laptop with charts on it

Unpack the interview questions for a Java developer

Preparing for a Java interview is tricky. You need to have a good understanding of the new features and concepts, as well as non-theoretical knowledge as many questions are based on practical work.

This three-week course will help you prepare for Java interviews as you delve into over 200 interview questions covering a varied range of topics. Using hands-on examples, you’ll take a step-by-step approach to ensure you can give confident answers in an interview.

Understand wrapper classes

You’ll be introduced to Java Classloaders and explore wrapper classes to help you answer questions on the use of primitive data as objects.

Next, you’ll explore questions based on practical work such as creating and manipulating Strings and the differences between a StringBuffer and StringBuilder.

Cover the basics of object-oriented programming

You’ll gain a solid foundation of knowledge of object-oriented programming as you explore the basic concepts such as method overloading and polymorphism.

Next, you’ll cover static variables, conditions, loops, and exception handling to build your understanding of Java.

The course will also cover miscellaneous topics to ensure you can answer questions on arrays, variable arguments, enum, and more.

Delve into multithreading

Finally, you’ll explore more advanced topics such as multithreading, collections, and generics.

You’ll finish by looking at functional programming and the new features in Java to ensure your knowledge is up to date.

By the end of the course, you’ll have a comprehensive understanding of Java. You’ll finish feeling confident and prepared for a Java interview.

Skip to 0 minutes and 1 second SPEAKER: Ace your interview for your dream job a job with this interview preparation course. Learn all you need to know in just three weeks. Ranga Karanam, founder of In28minutes, is the expert that will help you get interview smart. Throughout this course, you learn how to explore the Java platform, describe wrapper classes and strings, practise the basics of Object Oriented Programming, OOP, identify modifiers, conditions, and loops, explain exception handling, collections, and concurrent collections, discuss generics and multithreading, describe Lambda expressions and streams, and explore some new features in Java. If this sounds like the interview help for you, then get prepping today from anywhere at any pace. Step into your future with Interview Preparation for Java Developers from Packt and FutureLearn.


  • Week 1

    The Java platform, wrapper classes, strings, and the basics of OOP

    • Introduction to the course

      Welcome to Interview Preparation for Java Developers and the start of your learning journey, brought to you by Packt.

    • Java platform

      In this activity, we will explore the Java platform.

    • Wrapper classes and Strings

      In this activity, we will describe wrapper classes and Strings.

    • The basics of object-oriented programming (OOP)

      In this activity, we will discuss the basics of object-oriented programming.

    • Wrap up

      You have reached the end of Week 1. In this activity, you'll reflect on what you have learned.

  • Week 2

    OOP concepts, modifiers, conditions and loops, and exception handling

    • Introduction to Week 2

      Welcome to Week 2. In this activity we'll highlight the main topics that will be covered this week.

    • Advanced object-oriented programming concepts

      In this activity, we will discuss object-oriented programming concepts.

    • Modifiers

      In this activity, we will discuss modifiers.

    • Conditions and loops

      In this activity, we will describe conditions and loops.

    • Exception handling

      In this activity, we will discuss exception handling.

    • Miscellaneous topics

      In this activity, we will discuss a variety of different topics in Java.

    • Wrap up

      You have reached the end of Week 2. In this activity, you'll reflect on what you have learned.

  • Week 3

    Collections, generics, multithreading, functional programming, and new features

    • Introduction to Week 3

      Welcome to Week 3. In this activity we'll highlight the main topics that will be covered this week.

    • Collections

      In this activity, we will discuss collections.

    • Concurrent collections

      In this activity, we will discuss concurrent collections.

    • Generics

      In this activity, we will discuss generics.

    • Multithreading

      In this activity, we will describe multithreading.

    • Functional programming – Lambda expressions and streams

      In this activity, we will discuss functional programming, including Lambda expressions and streams.

    • New features

      In this activity, we will describe new features in Java.

    • Final week wrap up

      You have reached the end of this course. In this activity, you will reflect on what you have learned.

When would you like to start?

Start straight away and join a global classroom of learners. If the course hasn’t started yet you’ll see the future date listed below.

Learning on this course

On every step of the course you can meet other learners, share your ideas and join in with active discussions in the comments.

What will you achieve?

By the end of the course, you‘ll be able to...

  • Explore the Java platform.
  • Describe wrapper classes and strings.
  • Practice the basics of object orientated programming (OOP).
  • Identify modifiers, conditions and loops.
  • Explain exception handling, collections and concurrent collections.
  • Describe Lambda expressions and streams.
  • Explore new features in Java.

Who is the course for?

This course is designed for anyone who wants to prepare for a Java interview.

It will be most beneficial for those interested in working as a Java developer.

What software or tools do you need?

We assume that you have some experience as a Java developer, a working knowledge of Java, and access to an IDE for Java.

Who developed the course?


Founded in 2004 in Birmingham, UK, Packt’s mission is to help the world put software to work in new ways, through the delivery of effective learning and information services to IT professionals.


FutureLearn is a leading social learning platform and has been providing high quality online courses for learners around the world over the last ten years.

What's included?

This is a premium course. These courses are designed for professionals from specific industries looking to learn with a smaller group of like-minded individuals.

  • Unlimited access to this course
  • Includes any articles, videos, peer reviews and quizzes
  • Certificate of Achievement to prove your success when you're eligible
  • Download and print your Certificate of Achievement anytime

Still want to know more? Check out our FAQs

Learning on FutureLearn

Your learning, your rules

  • Courses are split into weeks, activities, and steps to help you keep track of your learning
  • Learn through a mix of bite-sized videos, long- and short-form articles, audio, and practical activities
  • Stay motivated by using the Progress page to keep track of your step completion and assessment scores

Join a global classroom

  • Experience the power of social learning, and get inspired by an international network of learners
  • Share ideas with your peers and course educators on every step of the course
  • Join the conversation by reading, @ing, liking, bookmarking, and replying to comments from others

Map your progress

  • As you work through the course, use notifications and the Progress page to guide your learning
  • Whenever you’re ready, mark each step as complete, you’re in control
  • Complete 90% of course steps and all of the assessments to earn your certificate

Want to know more about learning on FutureLearn? Using FutureLearn

Do you know someone who'd love this course? Tell them about it...