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

JavaScript-Developer-I real exams

Exam Code: JavaScript-Developer-I

Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)

Updated: Oct 05, 2026

Q & A: 149 Questions and Answers

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About Salesforce JavaScript-Developer-I Exam Free Dumps

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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

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

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

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

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:

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

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How much Salesforce JavaScript-Developer-I Exam Cost

The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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