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JavaScript Data Types and Expressions Skills Test
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JavaScript Data Types and Expressions Skills Test

Data Types and Expressions are crucial components of JavaScript language and must-haves for JavaScript Developers, Web Developers, or Full-Stack Developers. Using our test, you can benchmark individuals against industry and organizational standards and ensure a 50% reduction in hiring and upskilling time for niche tech roles.

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JavaScript Data Types and Expressions Skills Test

JavaScript is the third biggest web technology and a scripting language used to develop mobile apps, web pages, games, and more.

This language is crucial for any tech team, requiring candidates with excellent JavaScript Data Types and Expressions knowledge. These include variables, data types (numbers, strings, objects), operators, and expressions that can help effectively organize, manage, and represent data.

Why use iMocha’s JavaScript Data Types and Expressions Skills Test?

Our test encompasses several customizable elements that allow talent professionals to assess their candidates' and employees' proficiency in multiple areas, like JavaScript fundamentals, development principles, and more.

This ensures unbiased skills benchmarking that helps identify skill gaps and potential. It also leads to a 70% improvement in the interview-to-selection ratio and allows you to create employee-specific L&D programs.

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How it works

Test Summary

Our test enables you to benchmark candidates' and employees' knowledge and skills based on the following traits:

  • Knowledge of JavaScript data types: Numbers, strings, objects, arrays, and Booleans
  • Understanding of JavaScript operators: Arithmetic, comparison, logical, bitwise, assignment, and conditional operators
  • Ability to write and evaluate expressions in JavaScript
  • Proficiency in using built-in functions for data manipulation and conversion
  • Familiarity with regular expressions for pattern searching and manipulation in strings
  • Competence in working with JavaScript date objects and manipulating dates
  • Understanding of variable scopes and proper usage
  • Proficiency in manipulating and traversing arrays

With these tests, you can gain intelligent and powerful test insights about each employee and candidate, helping you accurately identify the job-fit candidates for your role or create avenues for upskilling.

Useful for hiring
  • JavaScript Developer
  • Front-End Developer
  • Full-Stack Developer
  • Web Developer

Test Duration
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Entry level/Mid/Expert
Topics Covered





Sample Question
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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 skills test customized?
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Our tests can be tailored to the different skill levels (beginner to advanced). They can include multiple question types like Multiple Choice Questions (MCQ), Coding Exercises, Scenario-based Questions, and more.

It also allows you to add pre-built modules such as JavaScript Developer Test, JavaScript Coding Test, React.js Test, D3.js test, Ember.js test, Backbone.JS test, and several others from the skills library to help you identify job-fit individuals for your roles.

What are the most common interview questions related to Javascript Data Types and Expressions Skills?
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Some of the most common questions include the following:

  • What are the different data types in JavaScript?
  • Why do we use ‘Debugger’ in JavaScript?
  • Difference between ‘var’ and ‘let’ in JavaScript.
  • Explain Implicit Type Coercion in JavaScript.
  • What are Classes in JavaScript?
  • Difference between rest parameters and spread operator.
  • Explain DOM and BOM.
  • What is the use of the constructor function in JavaScript?
  • Explain call(), apply(), and bind() methods.
What are the required skillsets for Javascript Data Types and Expressions?
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Some of the core skills to have are as follows:

Technical Skills:

  • Knowledge of data types like numbers, strings, objects, arrays, booleans, etc.
  • Ability to use Built-in JavaScript Functions like parseInt(), parseFloat(), toString(), and others
  • EXT JS
  • React JS
  • Angular
  • Vue JS
  • jQuery
  • Dojo
  • Underscore JS
  • Gulp
  • GWT
  • Backbone JS

Soft Skills

  • Creativity
  • Collaborative Skills
  • Team Management Skills
  • Attention to Detail
  • Analytical Skills
  • Problem-Solving
  • Adaptability

Boost Your Hiring Success: The Ultimate Guide to Assessing JavaScript Skills with Do's and Don'ts