Java is among the most widely used programming languages and picking the best Java developers critical for many businesses. It is the backbone of the smartphone app ecosystem and is also one of the most popular all-purpose languages, with over 8 million active users globally.

While its acceptance has stayed steady over the last six months, as per developer economics, the Java ecosystem has grown by 24% since mid-2017, with 1.6 million new developers joining the community.

Simply put, it aids in the creation of an app and its distribution throughout various platforms. Java is an object-oriented computer language that has a unique feature known as the just-in-time compiler.

When you’re assigned the task of seeking out the best fit for the role of a Java developer, it can be quite a challenge. But there’s nothing to worry about! With a little push in the right direction, you will be able to find the perfect fit.

As with any profession, when it comes to the role of a java developer certain requirements need to be fulfilled.

The very first thing you should do is familiarize yourself with the job role, this is important because it is almost used in every application. Talk to someone experienced, that is one great way of knowing what to look out for.

Determine Essential Java Skills

When recruiting new Java talent, it's critical to assess applicants' language skills and their understanding of the language's environments. Object-oriented programming should be well-understood by the applicants. They need to have a knowledge of threads, Servlets, and data types as well as the fundamentals of the class loading process.

• Good understanding of J2EE/Java
• XSL, XML, and X Query
• Algorithms and Data Structures
• Web services based on Java
• Designing Patterns and Object-Oriented Analysis
• Enterprise Java Beans (EJB)
• SQL, ORM, and Relational Databases
• Memory Management and JVM
• Synchronization and Multithreadin

Define Your Requirement Criteria

If You’re Hiring A Java Developer For Distributed Or Network Application

The applicant should be familiar with protocols like HTTP, IP, FTP, as well as sockets like RPC and RMI.

If You’re Hiring A Java Developer To Work On Java UI

The candidate must be familiar with cursors, triggers, SQL querying, and stored procedures.

If You’re Hiring A Java Developer For Web Applications

Remember that the applicant ought to be familiar with service-oriented architecture (SOA) and web services like REST and SOAP. They also should be familiar with markup languages like XML, JSP/Servlets, and web frameworks like Spring and Struts, as well as web technology like CSS, HTML, jQuery, and JavaScript.

Use Online Skills Assessment Platforms

If you do not know how to judge their coding skills, all you need to do is make use of online java code editors. These editors will help you judge the skill level of the candidates in a live and collaborative environment.

You can also pre qualify the candidates by sending them assessments in the initials round to gauge there knowledge. These developer assessment software like Intervue take remote test and score the candidates giving you detailed reports.

These reports can be used to make unbiased and data driven decisions as that you avoid costly mis-hires .

Technical assessments for java developers has also proved to be a boon for recruiters as it, helping them save time and filter the best candidates.

Prepare A List Of Questions

You should also make sure you come up with a list of Java interview questions, you should include a few easy ones and a few advanced ones as well because the advanced java questions will tell you more about where the candidate currently stands.

As mentioned above, you must make sure you have a set of questions ready. Furthermore, you must make sure that you are familiar with the answers as well, so make sure you do your homework.

Make sure you focus more on the advanced questions, something that you would ask a senior java developer. This will help you pick out the best.

Here is a list of senior java developer interview questions,

1. How is an Abstract class different from an Interface?.
2. How do you make a thread in Java? Give examples?”
3. Define Spring.
4. Why do we use the yield() method?
5. What does Application Context refer to?
6. Take a look at the two code snippets below:
   
   Code Snippet I
   class Adder {
   Static int add(int a, int b)
   {
   return a+b;
   }
   Static double add( double a, double b)
   {
   return a+b;
   }
   public static void main(String args[])
   {
   System.out.println(Adder.add(11,11));
   System.out.println(Adder.add(12.3,12.6));
   }
   }
   
   Code Snippet II
   class Car {
   void run()
   {
   System.out.println(“car is running”);
   }
   Class Audi extends Car{
   void run()
   {
   System.out.prinltn(“Audi is running safely with 100km”);
   }
   public static void main( String args[])
   {
   Car b=new Audi();
   b.run();
   }
   }
   What is the difference between the two?
   
7. Explain the functions of CI.
8. How to convert/read InPut Stream into String?
9. Can you explain the thread lifecycle in Java?
10. Differentiate between fail-safe and fail-fast.
11. Program for binary search.
12. Explain: why is Spring MVC considered to be better than JSP/Servlets.
13. Could you demonstrate how to delete a cookie in JSP with a code example?
14. Differentiate between Weakreference and Softreference in JAVA.
15. Spring IOC container: What is it?
16. Write suitable code examples to demonstrate the use of final, final, and finalize.

These are some important questions you should keep in mind. It will help you separate the best from the average.

Don’t forget, JAVA is still one of the most used programming languages which means there will be quite a lot of applicants. Hence, , you should make use of all the available resources like Intervue. These platforms will help you evaluate the skill of the applicant even if you’re not well-versed in the subject.

By now you should have a fair idea of what to expect. But do not be deterred, even though you’re interviewing applicants with expertise, you should be sure to keep a keen eye out for other qualities that may set the candidate apart from others. All you have to do is start preparing.