JavaScript Coding Specialist (JCS) Certification

The JavaScript Coding Specialist Exam is a globally-recognized certification which grants coding specialists, web developers and designers the ability to validate their front-end and back-end web development skills.

JavaScript is one of the most flexible and powerful programming languages implemented across the web allowing web designers and developers to build fluid interactive web pages. It is a popular language to learn because JavaScript is literally everywhere, unifying all web application development into one programming language.

What are the benefits of getting a JavaScript Certification?

The unique peculiarity of the JCS Certification is the assessment modality, which consists of a real live coding environment, offers candidates the ability to write proper code to perform task-based questions. This technology is called LITA (Live in the Application) and Knowledge Pillars is one of the very few organizations able to provide this very advanced assessment solution.

JavaScript was initially designed to make web pages come to life. The programs in this language are called scripts. It is one of the three main languages used and the most essential part of web application today. This 25-year-old programming language is listed as the first language to be learned by people who want to program because of its full-stack capabilities, it can be used as both a frontend and backend programming language.

Exam Details

Number of questions: 35

Time limit: 45 minutes

Passing score: 75%

Format: Linear and Live-in-the-App

The examination procedure
The students will have to answer all the question within the given timeframe.

They are free to ignore as many questions as they want. They will have the option to flag the questions and then review them at the end of the test (within the 45 minutes timeframe). All unanswered questions will be marked as incorrect.

When the test finishes the result of the examination is sent to the Knowledge Pillars server for storing.

Find more information about our Exam Retake Policy and Exam Proctoring options.

Exam Objective Domains

This exam validates the candidate’s ability to recognize and write syntactically correct JavaScript code, use data types supported by JavaScript, and be able to recognize and write JavaScript code that will logically solve a given problem.

It is recommended that candidates have at least 150 hours of instruction or hands-on experience with the JavaScript programming language before taking this exam. Candidates should also be familiar with JavaScript features and capabilities, and understand how to write, debug, and maintain well-formed, well-documented JavaScript code.

Skills Measured:

  1. Basic grammar, variable declarations, data types and literals
  2. JavaScript operators and expressions
  3. Control flow, loops, iterations and error handling
  4. Functions
  5. Working with Objects in JavaScript
  6. Interact with the Document Object Model
  7. Interact with HTML Forms

Objective Domain

1. JavaScript basics, variable declarations, data types and literals

1.1. JavaScript basics and comments

introduction to JavaScript; comments in JavaScript;

1.2. JavaScript variables and variable declarations

variables; variable declarations: var, let and cons; declaring variables; variable scope; global variables; constants; hoisting;

1.3. JavaScript data structures and types

data types: primitives (Boolean, null, undefined, Number, BigInt, String, Symbol ), Object; data type conversion; numbers and the ‘+’ operator; converting strings to numbers

1.4. JavaScript literals

Array literals; Boolean literals; Floating-point literals; Numeric literals; Object literals; RegExp literals; String literals


2. JavaScript operators and expressions

2.1. Types of operators and operator precedence

assignment; comparison, arithmetic operators, bitwise operators, logical operators, string operators, conditional (ternary) operator, comma operator, unary operator, relational operator;

2.2. Expressions

primary expressions; left-hand-side expressions;

3. Control flow, loops, errors and error handling

3.1. Control flow statements

Block statement; Conditional statement: if…else, switch

3.2. Loops and iterations statements

for statement; do…while statement; while statement; labeled statement; break statement; continue statement; for…in statement; for…of statement

3.3. Errors and Exception handling statement

throw statement; try…catch statement; final

4. Functions

4.1. Defining functions

4.2. Calling functions

4.3. Function scope

4.4. Function parameters

4.5. Arrow functions

5. Working with Objects in JavaScript

5.1. Objects and properties

5.2. Enumerate the properties of an object

5.3. Creating new objects

5.4. Inheritance

5.5. Comparing objects

5.6. Number and Date objects

5.7. Math Object and built-in Math functions (random; round; abs; floor; ceiling; min; max; pow; sqrt)

6. Interact with the Document Object Model and Browser Object Model

6.1. Construct the Document Object Model (DOM) tree

window; document; body; other HTML elements

6.2. Handle HTML events

onchange; onmouseover; onload; onclick; onmouseout; onkeydown

6.3. Output to an HTML document

innerHTML; write

6.4. Locate, modify and add HTML elements and attributes

getElementByld; getElementsByTagName; getElementsByClassName; setAttribute; createElement

6.5. Interact with the Browser Object Model (BOM)

manage state; display dialogs; determine screen size

7. Interact with HTML forms

7.1. Retrieves input from forms and sets form field values

retrieve form values; get values from different types of elements; prepopulate values; mask values; identify the DOM path;

7.2. Input validation

case; string comparisons; Not-A-Number (NaN)

7.3. Form submission

onsubmit; post versus get; potential targets for submission


Technical Requirements

The minimum system requirements are:

  • Operating system: Windows 7/8/10 OS, MacOS X 10.0x or newer, Linux OS
  • Minimum RAM: 1GB or more depending on the Operating System
  • Minimum processor: 1.0 Ghz or more depending on the operating system and the architecture
  • A color monitor with minimum display resolution: 1366px by 768px
  • Internet access
  • The latest version of the Chrome browser
  • Automatic updates, notifications, other popup windows, and anything that can disrupt the examination process should be disabled
.Net Coding Specialist Badge

JavaScript Coding Specialist

Number of questions:35
Time limit45 minutes
Passing score75%
FormatLinear and In-App
Exam valid for2 years

 Download JCS Datasheet

I am a business leader and I have a company in finance. We need very often to hire developers with Python or Javascript skills as development is an active part of our business; we need to improve continuously the stability and quality of our system, so we need people with experience. We receive between 500 and 1500 applications when we create a job post. One of the very first things we do is shortlist applications, by looking for specific words or certifications that can prove candidates have what we need.

Unfortunately, 2 out 3 candidates, even if certified, don’t seem to own quality skills and their knowledge seem to be more theoretical. KP certifications solve that issue, because now we know, in advance, that a candidate possessing those credentials must also own the knowledge in a practical way. KP significantly contribute to addressing and providing a solution to the skills gap in the modern world.

Jonathan Frazer

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