JavaScript

History:

JavaScript was created in 1995 by Brendan Eich while working at Netscape. It was originally developed in just 10 days and first appeared as “Mocha,” later renamed “LiveScript,” and finally “JavaScript” — a marketing move to ride on the popularity of Java at the time. Despite its rushed beginnings, JavaScript quickly became an essential part of web browsers, enabling interactive content and dynamic web pages.

Its purpose was to allow scripts to run in the browser without needing to reload the page. Over time, JavaScript evolved from a simple scripting language into a powerful, full-fledged programming language. The introduction of features like asynchronous programming (via Promises and async/await), ES6 modules, and event-driven architecture transformed JavaScript into a cornerstone of modern web development. Today, JavaScript powers not just front-end interfaces but also backend services via platforms like Node.js. It is used to build everything from web apps and mobile applications to server-side APIs, desktop software, and even games. Its flexibility, vibrant ecosystem (React, Vue, Angular, etc.), and vast community make it one of the most widely used and in-demand languages worldwide.

Related job titles:

Exam Structure for JavaScript Level 1:

WorkFrater JavaScript exam is divided into the following sections:

1. Basic Interview Questions:
   WorkFrater will ask your candidate a few basic questions about JavaScript, such as how long they have been learning and using it, examples of projects they’ve worked on, and some technical questions. The candidate will simply answer orally while the website records their responses. This will help your hiring team assess their knowledge of the programming language.
2. Data Types and Variables:
   Assess knowledge of JavaScript's variable declarations (var, let, const), primitive types, and type coercion.
3. Operators and Expressions:
   Evaluate understanding of arithmetic, comparison, logical, and assignment operators.
4. Control Flow (if, switch, loops):
   Test the ability to write conditionals and loops such as if, switch, for, while, and do-while.
5. Functions and Parameters:
   Understand how to declare and call functions, use parameters, return values, and basic arrow functions.
6. Arrays and Strings:
   Test knowledge of array manipulation (e.g., push, pop, map) and string methods (slice, toUpperCase, etc.).
7. Error Handling (Try-Catch):
   Test understanding of JavaScript’s error handling using try-catch blocks and common runtime errors.
8. Compiler Questions:
   The candidate is asked to write JavaScript code that must display a specific output or solve a defined problem. This section evaluates practical coding ability in a real-world context.

Results, videos and documents:

At the end of the exam, the website will generate a PDF file containing your candidate’s results. The document will provide a detailed analysis of their performance and offer valuable insights, including:

• Candidate Score: Total score and individual results for each question
• Global Statistics: Overall exam data such as the average score, number of candidates who passed or failed, average time taken, etc.
• Time Tracking: Time spent by your candidate on each question
• Performance Breakdown: Highlights of the candidate’s strengths and areas that need improvement

A video of the entire exam will also be available. One part of the video will display the candidate’s webcam, while the other will show their screen. This allows you to verify that the candidate did not cheat during the exam.

If you include this exam as a requirement in a job offer, the job offer page will provide additional insights once all candidates have completed the exam. The page will display:

• Ranking: A leaderboard showing candidates ranked from highest to lowest score
• Average Score: The average score of all candidates who have passed the exam
• Summary: A textual overview of candidate results, giving you a clear snapshot of their overall performance