Java Developer Interview Questions

Planning to recruit a Java Developer for your organization? Browse through our curated list of Java Developer interview questions to screen the most deserving one from the wide pool of applicants.An open laptop and books on a desk (Java Developer Interview Questions)

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Java Developer Interview Questions

This day and age, basic client/server applications are moving to a service-oriented architecture and enterprises are striving to step up to cloud architecture and mobile applications. In this ever-evolving digital landscape, Java is persistently seen as a major force that enables these advanced technologies.

With the Java taking the hot seat in the coding world, the demand for a proficient Java Developer is also now more than ever. From redesigning the user experience on the website to building mobile apps or ensuring that the business-critical applications and software stays cutting-edge, Java Developers are the ones we turn to. So, when it comes to building a world-class team of developers recognizing and recruiting quality talents becomes paramount.

Qualification to look for:

  • Bachelor’s degree in Computer Science, Information System or any other closely related field
  • A professional certification in Java

Skills to look for:

  • Relational databases
  • SQL and ORMJ2EE framework
  • Java-based web services
  • Object-oriented analysis and design
  • XML, Xquery, XSL
  • JSP EJB (Enterprise Java Beans)
  • Test-driven development

A resume by itself doesn’t exactly represent the actual skills of a candidate. Assess the candidates with accuracy using this comprehensive list of Java Developer interview questions.

Computer Science questions

  • What are the characteristics of an acid database system?
  • How will you detect a loop in a linked list?
  • What is the difference between thread and process?

Job-specific questions

  • What are the transient variables?
  • How are arguments passed in Java?
  • What do you know about encapsulation and polymorphism?
  • How will you differentiate runtime exceptions from checked exceptions?
  • What are lambda expressions and why is it considered to be a big thing in Java 8?
  • Differentiate ConcurrentHashMap from HashMap.
  • What is the function of an object factory?
  • How will you implement the Singleton pattern?
  • What is the difference between static and dynamic language?
  • Is Java statically or dynamically typed?
  • What is garbage collection in Java?