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Exam Code: JavaScript-Developer-I
Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer

Try Salesforce : JavaScript-Developer-I valid & accurate questions and answers

JavaScript-Developer-I

Updated: Aug 09, 2026

No. of Questions: 149 Questions & Answers with Testing Engine

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How to book the Salesforce JavaScript-Developer-I Exam

There are the following steps for registering the Salesforce JavaScript Developer I exam. Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

TopicDetails
Topic 1
  • Testing: In the topic, you will be required to evaluate unit tests and improve them. The exam will assess your ability to identify ineffective tests and modify them to make them more robust and accurate. This topic ensures that you can write and maintain effective tests, a crucial skill for ensuring code quality and reliability in professional environments.
Topic 2
  • Server Side JavaScript: This section focuses on Node.js and server-side JavaScript. Salesforce JavaScript programmers will be tested on their ability to identify appropriate Node.js implementations and commands for given scenarios. Additionally, you will need to recognize which Node.js core modules, libraries, and package management solutions fit specific requirements, reflecting your understanding of server-side development with JavaScript.
Topic 3
  • Browser and Events: The topic will challenge your ability to work with events, event handlers, and the DOM. You will need to demonstrate how to manage event propagation and utilize browser-specific APIs. Additionally, proficiency in using browser developer tools to investigate code behavior will be tested, making it crucial for you to understand browser interactions thoroughly.
Topic 4
  • Debugging and Error Handling: This section will measure the ability of JavaScript programmer to properly handle errors and debug JavaScript code. You will be expected to apply debugging techniques, such as using the console and breakpoints, to resolve issues. Proper error handling is crucial, and the exam will evaluate your skills in managing and correcting errors efficiently within your code.
Topic 5
  • Objects, Functions, and Classes: In this section, the focus is on applying object-oriented principles, functions, and classes. As a Salesforce JavaScript programmer, you will need to locate optimal function implementations and understand how to structure objects and classes for business solutions. You will also be tested on your ability to use JavaScript modules and decorators, while analyzing variable scope and execution flow.
Topic 6
  • Asynchronous Programming: Asynchronous programming is a key concept in JavaScript, and this section tests your understanding of event loops, asynchronous code execution, and handling promises. Salesforce JavaScript programmer will need to demonstrate their ability to implement asynchronous solutions for business requirements.

Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

What is the duration, language, and format of Salesforce JavaScript-Developer-I Exam

  • This exam is offered in only English.
  • The type of questions is Multiple Choice and situation-based questions.
  • There is a time limit of 105 minutes for the exam.
  • Passing score 65%
  • This exam consists of 60 questions

Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:Salesforce
Exam Name:Salesforce Certified JavaScript Developer I
Exam Number:JS-Dev-101
Exam Duration:105 minutes
Related Certifications:Salesforce Certified JavaScript Developer I Credential
Exam Price:$200 USD
Passing Score:65%
Certificate Validity Period:None (Credential does not expire)
Exam Format:Multiple-choice, Multiple-select
Real Exam Qty:60 (plus up to 5 unscored pilot questions)
Available Languages:English
Sample Questions:Salesforce JavaScript-Developer-I Sample Questions
Exam Way:Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center)
Pre Condition:None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam.
Official Syllabus URL:https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi

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