Study with JavaScript-Developer-I日本語 Actual Test Questions
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Last Updated: Aug 10, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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For more info read reference:
Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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
Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Variables, Types, and Collections | 23% | - Variable declaration and initialization - Array methods and data manipulation - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Type coercion and conversion rules - Truthy and falsy values |
| Asynchronous Programming | 13% | - Event loop and micro/macro tasks - Async/await syntax - Promises and chaining - Fetch API and HTTP requests - Callbacks and callback hell |
| Debugging and Error Handling | 7% | - Defensive programming practices - Debugging tools and breakpoints - Error types and exception handling - Console methods and logging |
| Browsers and Events | 17% | - Document Object Model (DOM) manipulation - Window and document object properties - Event handling, propagation, and delegation - Script loading and execution order - Browser APIs and Web Storage |
| Testing | 7% | - Testing frameworks and assertions - Test doubles and mocks - Code coverage and best practices - Unit testing concepts |
| Server-Side JavaScript | 8% | - Module system and require/import - Node.js fundamentals and runtime - Core Node.js modules - Command-line tools and scripts |
| Objects, Functions, and Classes | 25% | - Function definitions, parameters, and scope - Closures and execution context - Decorators and advanced function patterns - Object creation, properties, and methods - Modules and imports/exports - Class syntax, inheritance, and prototypes |
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