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Javascript Functions Skills Test
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Level of experience:
Entry level/Mid/Expert

JavaScript Functions Skills Test

This skills test helps evaluate an individual's proficiency in Javascript functions, enabling talent professionals to identify candidates and employees and plan hiring and L&D programs efficiently. With this assessment, L&D managers and TA professionals get detailed insights into their talent and make data-driven decisions.

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What is Javascript Functions?

It is the fundamental building block in JavaScript. These are reusable blocks of code that are used to invoke a specific task, calculate a value, or return an output.

Why use iMocha’s JavaScript Functions Skills Test?

This assessment tests candidates’ and employees' expertise in function declarations, closures, higher-order functions, and more.

This test also helps recruiters identify top talent better and faster. At the same time, internal teams and L&D managers can use it to test their talent pool and identify gaps to create focused upskilling programs.

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How it works

Test Summary

Using this Skills Test, organizations can easily screen candidates and identify employees who possess the following core skillsets:

  • The ability to write functions, handle parameters, perform calculations, and return values
  • Knowledge of object-oriented programming concepts, such as inheritance or encapsulation
  • Understanding of concepts and libraries (ExtJS, Backbone JS, Angular JS)
  • Ability to manipulate Document Object Model (DOM)
  • Familiarity with Asynchronous Programming concepts such as callbacks, promises, and async/await
  • Write unit tests for Javascript code using testing frameworks such as JEST or MOCHA
  • Excellent Knowledge of popular frameworks and libraries like React, Angular, and Vue
  • Experience optimizing performance, such as reducing the number of DOM manipulations and using caching
Useful for hiring
  • JavaScript Developer
  • Front-End Developer
  • Full-Stack Developer
  • Web Developer
Test Duration
No. of Questions
Level of Expertise
Entry level/Mid/Expert
Topics Covered





Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.
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Topics covered


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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.
How is this skill test customized?
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This Skill test can be customized based on the needs of the company, the seniority of the role, specific domains, and so on.

Talent professionals can choose from predefined test modules or create custom assessments. You can also select the desired difficulty level, the type of questions (MCQ, Scenario-based Questions, coding), and the specific topics to be covered - such as Function Declarations, Coding Tests, NodeJS, Angular JS, React JS, or others.

What are the most common interview questions related to Javascript Functions Skills?
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Some of the most common interview questions that are asked during interviews include:

  • Define anonymous function.
  • What is the use of the isNaN function?
  • What are undeclared and undefined variables?
  • What is the difference between JavaScript and Java?
  • What are the different data types present in JavaScript?
  • Is JavaScript a statically typed or a dynamically typed language?
What are the required skillsets to work on Javascript Functions?
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Given below are some skills that are required to work on this domain:

Hard Skills

  • Proficiency in core JavaScript
  • Understanding of HTML, CSS, DOM
  • Node.js, SQL, NoSQL, and other database technologies
  • React, Vue, Angular, and other front-end frameworks

Soft Skills

  • Analytical Thinking
  • Time Management Skills
  • Communication Skills
  • Ownership Mindset
  • Attention To Details
  • Decision-Making Skills
  • Adaptability