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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
To pass the Salesforce Certified JavaScript Developer I exam, candidates need to have a sound understanding of JavaScript programming language and its applications in the Salesforce platform. JavaScript-Developer-I exam consists of 60 multiple-choice questions and requires a passing score of 68%. JavaScript-Developer-I exam can be taken online, and the candidates have 105 minutes to complete it.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Async/Await syntax - Event loop and execution flow - Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) - Callbacks |
| Topic 2: Debugging and Error Handling | 7% | - Console methods for debugging - Error handling techniques (try/catch/finally) - Breakpoints and code inspection - Custom error types |
| Topic 3: Server Side JavaScript | 8% | - Core Node.js modules - CLI commands - Package management (npm) - Node.js fundamentals - Server-side JavaScript implementations |
| Topic 4: Browser and Events | 17% | - Event propagation (bubbling and capturing) - Event handling and listeners - DOM manipulation - Interacting with forms and user input - Browser-specific APIs - Browser Developer Tools usage |
| Topic 5: Testing | 7% | - Test effectiveness evaluation - Writing and modifying unit tests - Test coverage and reliability - Unit testing concepts |
| Topic 6: Objects, Functions, and Classes | 25% | - Prototypal inheritance - Modules and decorators - Variable scope and closures - Arrow functions - Execution flow and context - Object creation and manipulation - Higher-order functions - Function declarations and expressions - ES6 classes and inheritance |
| Topic 7: Variables, Types, and Collections | 23% | - Arrays and collections - JSON parsing and manipulation - Primitive and complex data types - Strings, numbers, and dates - Truthy and falsy evaluations - Variable declarations and initialization - Type coercion and conversion |
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