Core Java Test - Hire The Best Core Java Developers For Your Organization

What is Core Java?

Java is an OOP based high-level programming language, which is also a brainchild of the Sun Microsystems, a company that was later acquired by the Oracle Corporation. Core Java is a non- standard definition and is a term coined by Sun Microsystems to explain the Java Standard Edition (Java SE). Besides being the essential and sturdiest version of Java, it lends itself well to be used for various other editions of Java. A good Core Java developer should be proficient in Java and Object-Oriented Programming concepts along with having ample experience in Java general-purpose packages.

What concepts are included in the Core Java?

Core Java concepts are useful in building general applications. They are as follows:

  • Object-oriented programming concepts (OOP) 
  • String handling
  • Basic Java constructs
  • Multithreading
  • Exception handling
  • Collection framework
  • Serialization and Deserialization
  • Generics
  • Concurrent collection
  • Synchronization

About Core Java Online Assessment
Core Java assessment helps tech recruiters in evaluating the technical skills of candidates for Core Java. Seasoned Java experts have designed and validated these Java developer tests conformed to industry standards.

What do the Core Java Developer Tests measure?

This java test will help you in measuring:

  • Basics of Java Programming
  • Object-Oriented Programming concepts
  • Knowledge of general purpose Core Java packages
  • Proficiency in handling exceptions
  • Multi-threading programming concepts
  • Hands-on debugging and development skills

Where is the Core Java used?

Core Java is a stepping stone to learn advanced Java. Learners need to master the basics of  Java first before taking up an advanced level. Core Java is essential to determine if one wants to deep dive into other advanced versions of the programming language. It comes in especially handy for designing application software for desktop and server environments.

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Looking for a customised test?

Are you looking for a customised version of this test. Or looking to get a new test build according to your requirements from scratch? Reach out to our subject matter experts and discuss the same.

Why should you use Mercer | Mettl’s Online Core Java test?

The Core Java developer test helps recruiters in many ways, including finding a suitable candidate without difficulty, assisting them in taking unbiased hiring decisions and providing detailed attention on every topic. Consequently, it reduces the administrative burden of conducting assessments at scale.

Mettl’s online aptitude test for Core Java helps in finding those candidates who are well-versed with programming. Below is a list of critical skills that most recruiters look for:

  • Knowledge of OOP concepts
  • Familiarity with features like polymorphism, interfacing, class overriding, and interfacing
  • Proficiency in Streams, Java 8 Lambda, and other functional interfaces

Hiring managers can use in-depth insights from the test to find the best-fit candidates. Evaluating candidates with a Core Java test is a reliable process that takes place in a secured, controlled environment. Conducting assessments becomes easy with features like limited system access, webcam proctoring, and window violation. The Core Java Developer test is ideal for identifying the skills that a professional  would be expected to possess.

Number of Sections  4
Number of Questions 20
Test Duration 60 Minutes
Test Language English


Sectional Details:


Hands-on Coding Assesses a candidate's debugging skills in Java, along with problem-solving and development skills No. of Problems:2
Technical Skills Assesses a candidate’s necessary skills in Java and familiarity with technical concepts, for instance, Object-Oriented Programming concepts, packages, exception handling, and multithreading.

4 MCQ/MCA items based on Java basics


8 MCQ/MCA items to test Object-Oriented Programming concepts


6 MCQ/MCA items to test proficiency in advanced topics such as packages, exception handling and multithreading

Candidates with a work experience of 0.5-2 years can take the test. 

Difficulty level: Moderate

Key profiles the test is useful for:

  • Core Java Developer
  • Junior Java Developer
  • Software Developer (Java)
  • Java Developer

Answer to common queries:

Q. Can candidates be benchmarked based on the internal sample set?

Yes, at Mettl, it can be done. Should you need any further information, please write to us, and we will be happy to assist you

Q. Is it possible to customize the report as per the need?

A. Yes, we can do it. We have already done it in the past for our clients. Should you need any further information, please write to us, and we will be happy to find the best solution for you.

Q. How can I prepare for a Core Java experienced test?

A. The best way would be by brushing up on these topics to ace the test:

  • In-depth knowledge of operators, basic syntax, keywords, etc.
  • Understanding of Methods and data types
  • Well-acquainted with OOPS concepts, collection framework, exception handling, generics, AWT and Swing, and multi-threading.

Q. What is the OOP concept?

A. OOP stands for Object-Oriented Programming. There are 4 major OOP concepts:  inheritance, abstraction, polymorphism, and encapsulation. These concepts are vital to understanding how Java works.

Q. Which type of questions are asked in Core Java Assessments?

A. A comprehensive test that comprises four sections is an hour long. The test aims at thoroughly gauging the depth and breadth of a candidate’s knowledge across OOP basics, string handling concepts, exception handling, array, and collection framework. The online core java assessment includes the choicest problems to evaluate the knowledge, concepts, analytical skills of the candidates with utmost precision.

Q. What are the skills required for core java?

A. The primary skills required for the core java test are:

  • Ability to write good codes on paper and compile them
  • Ability to use a debugger for debugging and application profiling
  • Well-acquainted with all the primitive data types and operators 
  • Strong knowledge of the class loading process 
  • Ability to handle multiple threads both accurately 
  • Well-versed in using checked exceptions, enums, and generics
  • An in-depth understanding of garbage collection
  • Ability to use java design patterns such as Singleton, Fly-weight, Factory, Builder, Iterator, Object Pool, Strategy, Composite, Visitor

How it works:

step 1

Add this test to your tests

step 2

Share test link from your tests

step 3

Candidate take the tests

step 4

You get their tests report

Note You will be charged only at step 3. i.e. only when candidate start the test.

Relevant for Industries

  • IT
  • ITeS

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