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

Salesforce JavaScript-Developer-I test insides dumps
  • Exam Code: JavaScript-Developer-I
  • Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
  • Updated: Aug 05, 2026
  • Q & A: 149 Questions and Answers
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About Salesforce JavaScript-Developer-I PDF & Testinsides IT real test

Who should take the Salesforce JavaScript-Developer-I Exam

This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:

  • Software/backend developer
  • Support engineer
  • Web application developer
  • Full stack developer
  • Salesforce developer
  • Technical Product Manager
  • UI/UX Engineer
  • Technical Project Manager
  • Front end developer
  • JavaScript programmer

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
  • There is a time limit of 105 minutes for the exam.
  • Passing score 65%
  • The type of questions is Multiple Choice and situation-based questions.
  • This exam consists of 60 questions
  • This exam is offered in only English.
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:
SectionWeightObjectives
Topic 1: Testing7%- Test doubles and mocks
- Unit testing concepts
- Code coverage and best practices
- Testing frameworks and assertions
Topic 2: Server-Side JavaScript8%- Module system and require/import
- Core Node.js modules
- Node.js fundamentals and runtime
- Command-line tools and scripts
Topic 3: Asynchronous Programming13%- Promises and chaining
- Async/await syntax
- Event loop and micro/macro tasks
- Callbacks and callback hell
- Fetch API and HTTP requests
Topic 4: Debugging and Error Handling7%- Defensive programming practices
- Console methods and logging
- Error types and exception handling
- Debugging tools and breakpoints
Topic 5: Variables, Types, and Collections23%- Truthy and falsy values
- Array methods and data manipulation
- Type coercion and conversion rules
- Variable declaration and initialization
- Working with strings, numbers, dates, and booleans
- JSON parsing and usage
Topic 6: Objects, Functions, and Classes25%- Modules and imports/exports
- Closures and execution context
- Object creation, properties, and methods
- Function definitions, parameters, and scope
- Class syntax, inheritance, and prototypes
- Decorators and advanced function patterns
Topic 7: Browsers and Events17%- Event handling, propagation, and delegation
- Document Object Model (DOM) manipulation
- Script loading and execution order
- Window and document object properties
- Browser APIs and Web Storage

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