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Core Java Online Test
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Core Java Online Test

Our Core Java online test is ideal for technical recruiters & hiring managers to hire job-fit candidates for the role of Core Java Developers. This pre-employment test evaluates candidates’ knowledge on Core Java 8, Exception handling, OOPs, Lambda function, and JDBC. The Core Java assessment test can reduce time-to-hire by 45% by enabling employers to identify top talent early in the recruitment process.

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Core Java Online Test – Java 8

The Core Java online test for experienced candidates helps technical recruiters and hiring managers to effortlessly assess the technical knowledge of senior candidates in Core Java. The Java 8 online test is designed & validated by experienced Java experts to assess & hire Core Java developers as per industry standards.

Why use iMocha's core Java aptitude test for experienced?

Core Java online test helps employers in many ways including hiring job-fit experienced candidates within a short period, making unbiased employee performance appraisal decisions, and reducing hassles in mass recruitment. This AI-powered Java 8 assessment test reduces technical screening time by 85%.

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How it works

Test Summary

The Core Java assessment test helps to screen the candidates for the following:

  1. Extensive experience in implementing object-oriented concepts.
  2. The ability to use advanced class features like polymorphism, class overriding, and interfacing to develop efficient and reusable code.
  3. Strong knowledge of Java 8 Lambda, Streams, Optional, and other functional interfaces.

Employers can use intelligent & powerful test Insights to identify job-fit candidates more accurately with the score distribution & section analysis features. Assessing candidates with a Core Java online assessment test is secure and reliable. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. Features like window violation and webcam proctoring help detect cheating during the test.

The Java 8 online test is designed considering EEOC guidelines and helps assess & hire diverse talent without any bias.

The test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), Fill in the Blanks, Whiteboard Questions, Audio / Video Questions, LogicBox (AI-based Pseudo-Coding Platform), Coding Simulators, True or False Questions, etc.

Discover in this blog post how iMocha's assessments can aid you in evaluating and recruiting Java developers.

Useful for hiring
  • Core Java Developer
  • Core Java Programmer
  • Java Application Engineer
  • Java Full Stack Developer
  • Java Solutions Architect
  • Java Enterprise Developer
  • Java Integration Developer
  • Java Developer with 1-3 yrs of experience
Test Duration
No. of Questions
Level of Expertise
Topics Covered

Core Java 8

It includes a huge upgrade to the Java programming model and a coordinated evolution of the JVM, Java language, and libraries.

String data handling

In Java, a string is basically an object that represents a sequence of char values. An array of characters works the same as a Java string.

Streamed API

The Stream API is used to process collections of objects.

Lambda Function

Java lambda expressions are Java's first step into functional programming. A Java lambda expression is thus a function which can be created without belonging to any class


JDBC makes it possible to establish a connection with a data source, send queries and update statements, and process results.

Java oops

OOPs in Java organize a program around various objects and well-defined interfaces. The OOPs Concepts in Java are abstraction, encapsulation, inheritance, and polymorphism.
Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.
Question type
Multiple Option
Topics covered
Java 8 - Generics


You have extracted an element from a list and cast it to a string A. What might be the result of this operation?


  • An unchecked error might be thrown.
  • A ClassCastException is thrown.
  • A ClassErasureException is thrown.
  • An UnIdentifiedTypeCast error is thrown.
A helicopter view of the employee's progress
Test Report
You can customize this test by

Setting the difficulty level of the test

Choose easy, medium, or tricky questions from our skill libraries to assess candidates of different experience levels.

Combining multiple skills into one test

Add multiple skills in a single test to create an effective assessment and assess multiple skills together.

Adding your own
questions to the test

Add, edit, or bulk upload your coding, MCQ, and whiteboard questions.

Requesting a tailor-made test

Receive a tailored assessment created by our subject matter experts to ensure adequate screening.
What is Core Java?
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Core Java is the part of Java programming language which covers basic concepts of Java. Java Standard Edition (J2SE) is categorized as Core Java which is used to develop general-purpose applications. Core Java mainly covers concepts like OOPs concepts (Data Abstraction, Encapsulation, Inheritance, Polymorphism), Basic Java constructs like loops and data types, String handling, Collection framework, Multithreading, and Exception handling etc.

Why use iMocha's core Java online test
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iMocha's core Java online test helps recruiter & hiring managers to assess core Java programming skills of the candidates. Our test is designed to assess experienced candidates and help recruiters to:

  • Reduce hiring cost by 40% with automated Core Java test
  • Reduce technical screening time by 80%.
  • Take data driven hiring decisions with comprehensive and comparative reports of the assessments

What are the key skills that recruiter should look for while hiring core Java developer?
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You need to consider the key skills below while hiring Core Java developer:

Technical Skills:

  • Handling Exceptions
  • Multithreading
  • Class Fundamentals
  • Data Types
  • String handling

Soft Skills:

  • Interpersonal Skills
  • Work Ethics
  • Analytical Thinking
  • Good Communication
  • Learning concepts and using them solve problems

What are a few interview questions that recruiter/hiring manager should ask while hiring core Java developer?
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Here are few interview questions that you can ask to Java developers & predict their technical proficiency:

  • What are the features of Core JAVA?
  • What is Java virtual machine?
  • What is meant by the Local variable and the Instance variable
  • What are the main differences between the Java platform and other platforms?
  • What is platform independent feature in Java?
  • What is classloader?
  • What is Method Overriding in Core Java?
  • What do you mean by package in Core Java?
  • What is Externalizable interface?
  • What is Session Management in Core Java?

Uncover top talent with our selection of Java interview questions, designed to measure candidates' technical prowess and align them with your team.

How do you assess the core Java skills?
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iMocha’ MCQ based core Java assessment includes over 500 questions with various topics like Java OOPs, string data handling, Lambda function, and streamed API which helps to assess practical knowledge of candidates. This helps to quantify core Java developer's skills and select the right candidate amongst all.

How do you conduct technical skills assessment?
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You can conduct remote technical skills assessments with 4 easy steps with iMocha:

  1. Select from 1000+ technical skills tests or Job role-based assessments from iMocha’s skill library. Ensure test integrity by adding cheating prevention measures like image, audio, video proctoring, and window lock, etc.
  2. Invite candidates through an email by sharing assessment link
  3. Get comprehensive and shareable reports upon completion of the online technical assessment
  4. Identify right candidates for further interviews