Pre-employment Skills Assessment

This advanced JavaScript test is designed for the thorough evaluation of a candidate's expertise in JavaScript, focusing on essential skills required for modern web development. It tests candidates on advanced concepts, problem-solving abilities, and practical application of JavaScript in real-world scenarios, ensuring a comprehensive assessment of their programming skills.






10 min

Test type


About the test

The JavaScript assessment is meticulously designed to evaluate a candidate's proficiency in JavaScript, focusing on advanced concepts and techniques essential for developing dynamic and interactive web applications. It covers a comprehensive range of topics, including ES6 features, asynchronous programming, closures, the document object model (DOM), Event Handling, Promises, and more. This test will challenge candidates on their ability to solve complex problems, understand nuanced aspects of JavaScript programming, including scope, context, and execution patterns. By incorporating a mix of theoretical questions and practical problems, this assessment aims to gauge both the depth of knowledge and the ability to apply JavaScript in real-world scenarios. The questions are crafted to test understanding beyond basic syntax and delve into the intricacies of JavaScript as a powerful scripting language used for client-side logic in web development. It's an excellent tool for employers to identify candidates with a solid foundation in JavaScript and the capability to leverage this language's full potential to build efficient, effective, and sophisticated web applications.

This test is relevant for

Front-End Developer
Requires deep understanding of JavaScript for building interactive user interfaces.
Full Stack Developer
Necessitates proficiency in JavaScript for both server-side and client-side scripting.
Web Developer
Involves extensive use of JavaScript for creating dynamic and responsive web pages.
UI/UX Developer
Demands a strong grasp of JavaScript to implement engaging and user-friendly web designs.
JavaScript Engineer
Specializes in JavaScript, crafting advanced web applications and services.
Software Engineer
Requires knowledge of JavaScript among other languages for software development.

Skills measured

Advanced JavaScript Concepts
Understanding of closures, prototypes, this keyword, and new ES6 features.
Asynchronous Programming
Capability to handle asynchronous operations using callbacks, promises, and async/await syntax.
DOM Manipulation and Event Handling
Skilled in interacting with the DOM effectively and handling user input through events.
Error Handling and Debugging
Adept at identifying, troubleshooting, and resolving errors or bugs in JavaScript code.
Functional Programming
Proficiency in utilizing JavaScript's functional programming concepts to write cleaner and more efficient code.
Performance Optimization
Knowledge of optimization techniques to improve the performance of JavaScript applications.

Sample questions

Preview a few questions that can be found in this test.
JavaScript Test Preview
Question 1/3
What will `typeof null` return?
Select all that apply

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