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Salesforce Certified JavaScript Developer I certification is an essential certification for developers who want to demonstrate their knowledge and skills in JavaScript programming language and its integration with Salesforce. Salesforce Certified JavaScript Developer (JS-Dev-101) certification exam is challenging but rewarding, and passing it demonstrates the candidate's proficiency in developing custom applications on the Salesforce platform.

Salesforce Certified JavaScript Developer I certification exam consists of 60 multiple-choice questions that must be completed within 105 minutes. JavaScript-Developer-I exam covers a range of topics, including Lightning Data Service, Apex, JavaScript, and Lightning Web Components. To prepare for the exam, Salesforce recommends taking the Building Lightning Components with JavaScript course, which covers the fundamentals of building custom Lightning components using JavaScript. Additionally, Salesforce offers Trailhead, a free online learning platform that provides hands-on experience with building custom applications on the Salesforce platform.

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

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Salesforce Certified JavaScript Developer I exam consists of 60 multiple-choice questions that must be completed within 105 minutes. JavaScript-Developer-I exam covers a range of topics, including JavaScript, Salesforce fundamentals, and Lightning Web Components. Candidates will be tested on their ability to write efficient, reusable, and maintainable code, as well as their knowledge of best practices and industry standards.

Salesforce JavaScript-Developer-I Certification Exam covers a variety of topics related to the development of custom applications on the Salesforce platform using JavaScript. These topics include but are not limited to data modeling, server-side development, client-side development, security, testing, and deployment. JavaScript-Developer-I exam also covers the use of Lightning Web Components, Aura Components, and other Salesforce development tools and technologies.

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Objects, Functions, and Classes25%- Arrow functions
- Object creation and manipulation
- Execution flow and context
- ES6 classes and inheritance
- Prototypal inheritance
- Higher-order functions
- Modules and decorators
- Function declarations and expressions
- Variable scope and closures
Topic 2: Asynchronous Programming13%- Async/Await syntax
- Promises (creation, chaining, error handling)
- Asynchronous patterns for business requirements
- Event loop and execution flow
- Callbacks
Topic 3: Browser and Events17%- Event propagation (bubbling and capturing)
- Browser-specific APIs
- DOM manipulation
- Browser Developer Tools usage
- Event handling and listeners
- Interacting with forms and user input
Topic 4: Testing7%- Test coverage and reliability
- Writing and modifying unit tests
- Test effectiveness evaluation
- Unit testing concepts
Topic 5: Variables, Types, and Collections23%- JSON parsing and manipulation
- Truthy and falsy evaluations
- Primitive and complex data types
- Strings, numbers, and dates
- Arrays and collections
- Type coercion and conversion
- Variable declarations and initialization
Topic 6: Server Side JavaScript8%- Node.js fundamentals
- Core Node.js modules
- Server-side JavaScript implementations
- Package management (npm)
- CLI commands
Topic 7: Debugging and Error Handling7%- Console methods for debugging
- Error handling techniques (try/catch/finally)
- Custom error types
- Breakpoints and code inspection

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