Java Developer – Interview Questions and Answers

A java developer designs, develops, implements, and tests web-based Java applications to support business and client needs, working with clients and team members through many layers of application architecture. From simple web-based applications to sophisticated desktop applications, Java developers program, troubleshoot, and configure these apps to enhance user friendliness. Processes include upgrading website design and functionality according to client’s needs. Creativity, problem-solving, and independent initiative are vital skills to a developer.


  1. What tasks are required in a typical Java developer position?

Java developers work in a team-oriented atmosphere geared toward developing applications and improving efficiency throughout their life-cycles. Extensive knowledge of web architecture and content strategy is required to complete web development tasks such as animations, routing, data manipulation, business meetings, and using programs such as JavaScript.


  1. How would you optimize the assets, features, and resources of an app or website?

This question will give an employer an idea of what your web development techniques are and how they could be implemented into their existing team. This is an important question. Answer without molding your answer to the employer’s needs unless you are confident that their needs closely match your abilities and style. No matter how much you want the job, too much change might not make you so happy when you start working.


  1. How do you deal with disagreements and discrepancies with coworkers?

A question like this is extremely important to answer well. The answer should show your character, especially involving conflict management. Try to think of a specific situation or two where you disagreed with a coworker. What was the disagreement? What did you do to help come up with a solution? What was the outcome? Giving a detailed answer is encouraged and will allow the employer to see a side of your personality that they can’t see in a resume.


  1. How do you adapt when priorities in the workplace change quickly?

The IT industry is constantly changing, which means the work will also be changing at a nearly equal pace. Adapting quickly to changes in the workplace shows valuable versatility and portrays an attitude that is ideal in a rapidly changing technological industry. It would be helpful to give an example of a time that you were forced to adapt to change quickly and describe how you handled it.


  1. Talk about your preferred development environment.

This question allows the employer to see how well you would fit into an already existing team. Be honest and sincere in your answer. Describe things that work well for you as well as things that don’t. Your answer should be relevant to the employer’s environment and needs, but don’t misconstrue your answer into one that isn’t true for you.


  1. How confidently do you make decisions in the workplace?

Even small decisions in the IT industry can have rippling effects and it is important to be confident in each choice that you make. The employer wants to know how your decision-making process enables and exhibits confidence in you as well as other decision-makers. Having a noticeable aura of confidence in your answer can make a huge difference in how the employer interprets your answer. Be honest and truthful when answering, though, and let the employer know you are a capable employee.


  1. When have you taken an innovative approach to solving a problem?

When answering this question, be sure to portray a unique way in which you solved a problem with a different approach than most people would use. Employers want to know how you approach problem-solving and this is a great question to show to employer that you are a better choice for the job than others.


Technical Questions

  1. What is the difference between JDK and JRE?

JDK is a bundle of software that you can use to develop Java-based software. JRE is an implementation of the Java Virtual Machine executes Java programs. Usually, JDK’s contain at least one JRE along with various development tools

  1. How does Java implement polymorphism?

Java uses inheritance, overloading, and overriding to implement polymorphism. In Java, polymorphism is implemented multiple ways under an identical name. In some instances, some methods may have the same name, but different argument lists, often referred to as overloaded methods. Other times, methods have identical names, return types, and argument lists, which are often referred to as overridden methods.

  1. How do you organize your JavaScript code?

Java is an important component of web development as well, and this question lends more opportunity for elaboration. It’s still a question that gauges your knowledge, but it also gives you a chance to outline your skills and techniques in order to show what you could bring to the company.

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