JavaScript Test for identifying and recruiting top talent

The JavaScript Assessment measures an applicant's skills and knowledge in creating webpages and apps, adding interactive behaviour to webpages, developing server applications, and building web servers.  The JavaScript Skills Test is a crucial tool for the recruiter to find highly skilled JavaScript developers, make data-backed comparisons between candidates, and ensure individuals have knowledge and skills aligned with the business. The assessment includes technical questions for measuring a developer's talent in JavaScript, its critical applications and frontend development. The tests evaluate candidates' knowledge of hands-on Java programming, frontend development skills, JavaScript and Java fundamentals.

What is JavaScript?

JavaScript is a programming language that offers dynamic interactivity on websites. JS is one of the core technologies of the web. It enables the creation of interactive user interfaces we observe and experience online. Some of the most popular frameworks are based on JavaScript, namely Ember.js, AngularJS, Node.js, React, and Vue.js. A strong foundation in JavaScript programming is essential for junior programmers' careers and professional growth.

Benefits of the JavaScript Test

The JavaScript Online Test, created by industry experts, helps tech recruiters and employers assess candidates' frontend logic skills. These tests eliminate unconscious bias and provide a fair evaluation of competencies, enabling employers to select suitable candidates objectively. JavaScript assessments save time by replacing redundant technical evaluations and allow hiring managers to focus on other tasks. Additionally, these tests help organizations create development plans for future leaders by identifying strengths and areas for improvement.

What is inside this JavaScript Test?

The JavaScript Test is holistically designed to test applicants' knowledge and applied skills. This sixty-minute test includes twenty multiple choice and two coding questions to be solved on Mercer | Mettl’s frontend simulator for testing a candidate's frontend development skills and fundamental concepts of JavaScript.

What skills does this JavaScript Test cover?

• Hands-on Java programming   

The JavaScript Technical Test assesses candidates' coding skills on a simulator by giving real-world problems and measuring their hands-on experience and capability to code in the desired language.   

• Frontend development skills   

The test consists of hands-on coding questions for evaluating a candidate's frontend web development skills and knowledge of JavaScript basics.   

• Java basics   

The JavaScript Assessment aims to understand a candidate's proficiency in the given skills - Flow of Control, Strings and Methods, OOPS Concepts, Classes Objects and Methods, Interfaces and Inheritance in Core Java and Java - OOPS.   

• JavaScript   

This JavaScript Test gauges the candidate's strengths in these skills: Arrays, Parsing, Events and Event Handlers, Object Usage, Scopes and Namespaces and Properties application, Forms along with HTML and Links in JavaScript programming.

What roles can you assess using the JavaScript Test?

• JavaScript developer: A JavaScript developer designs applications and software using Java. JavaScript developers work on websites, producing frontend applications and performing code analysis and overall improvement of style and usability. 
• Frontend developer (JavaScript): JavaScript frontend developers enable interactivity and dynamic content to static web pages. They create seamless and engaging user experiences, from simple form validations to complex animations. 
• Software developer (JavaScript): JavaScript is one of the familiar programming languages software engineers use. JavaScript software developers are responsible for mobile and web applications, big data technologies and embedded systems.

Practice questions with answers

1. Is JavaScript solely for web development usage?     

JavaScript is used to create appealing websites and develop mobile apps and browser-based games for various operating systems.   

2. What is the meaning of a test method in JavaScript?     

The test method looks for approximate string matching. In case of a match, the method returns true; otherwise, it returns false.  

3. Is JavaScript case-sensitive?     

Yes, JavaScript language is a case-sensitive programming language.   

4. What does NaN mean in JavaScript?     

The Nan property implies a "Not-a-Number" value.   

5. What is bubbling in JavaScript?     

The bubbling process is where the element triggers the event and then bubbles up to the contained elements in the hierarchy. 

6. What is null JavaScript?     

The 'null' value is the intended omission of any object value.   

7. Where is the correct place to insert JavaScript?     

The appropriate place to insert JavaScript is in the <head>, the <body> section of an HTML page, or both. 

8. Is JavaScript frontend or backend?     

It is both frontend and backend because it is used across the web development stack.   

9. What is the meaning of '$' in JavaScript?     

The dollar sign ($) is a JavaScript identifier. 

10. What are the features of JavaScript?   

Some features are functional, dynamic typing, OOP support, platform independence, prototype-oriented, async operations, client-side validation and effective browser control.