Salesforce JavaScript-Developer-I : Salesforce Certified JavaScript Developer (JS-Dev-101)

  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Oct 10, 2026
  • Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam

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Topics of Salesforce JavaScript Developer I Exam

Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:

1. Variable, Types, and Collection: 23%

Scenario based coding Variables Creation and Initialization JSON object understanding

2. Object, Functions, and Classes: 25%

Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow

3. Browser and Events: 17%

Handling and propagation of events Development tools of browsers Understanding of browser specific APIs

4. Asynchronous Programming: 13%

Asynchrounous programming different concepts Monitoring and management of different loops

5. Server Side Javascript: 8%

Implementation of Node.js Understanding of Node.js CLI commands

6. Testing: 7%

Unit Testing effectiveness of different tests

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

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

How to Prepare for Salesforce JavaScript Developer I Exam

Preparation Guide for Salesforce JavaScript Developer I Exam

Introduction

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

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Difficulty in Writing of Salesforce JavaScript-Developer-I Exam

As Javascript development observed in nearly all organizations, Salesforce JavaScript-Developer-I is the most successful qualification candidates can get on their resume. Professionals have therefore been known to demonstrate concern. But this JavaScript-Developer-I can be very easy to clear if practitioners study with JavaScript-Developer-I exam dumps and then take the JavaScript-Developer-I practice exams. However, with accurate focusing and proper planning content, candidates will clear the test. With the aid of these materials, aspirants get reasonable idea about the kind of questions they pose in actual certification, the certification questions provides the most-represented JavaScript-Developer-I practice exams. The Salesforce experts check Free4Torrent JavaScript-Developer-I exam dumps. Certification questions also include a test for practise and is an ideal forum for checking the information achieved.

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Variables, Types, and Collections23%- Type coercion and conversion rules
- Variable declaration and initialization
- Working with strings, numbers, dates, and booleans
- JSON parsing and usage
- Truthy and falsy values
- Array methods and data manipulation
Browsers and Events17%- Window and document object properties
- Event handling, propagation, and delegation
- Document Object Model (DOM) manipulation
- Browser APIs and Web Storage
- Script loading and execution order
Objects, Functions, and Classes25%- Object creation, properties, and methods
- Decorators and advanced function patterns
- Modules and imports/exports
- Class syntax, inheritance, and prototypes
- Function definitions, parameters, and scope
- Closures and execution context
Testing7%- Unit testing concepts
- Code coverage and best practices
- Testing frameworks and assertions
- Test doubles and mocks
Debugging and Error Handling7%- Console methods and logging
- Debugging tools and breakpoints
- Error types and exception handling
- Defensive programming practices
Asynchronous Programming13%- Async/await syntax
- Callbacks and callback hell
- Fetch API and HTTP requests
- Promises and chaining
- Event loop and micro/macro tasks
Server-Side JavaScript8%- Node.js fundamentals and runtime
- Command-line tools and scripts
- Module system and require/import
- Core Node.js modules

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