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The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.
Functions (more functions in higher order)
Control of Mistake
Conversion type (inclusive versus explicit)
Scope of Variables
Monitor (agnostic platform)
Modules
JavaScript on the backend
Activities
Discharge
Strings
Objects & Arrays: Data Structures
Classes
Asynchronous Programming
Forms of data and operators
Item Model Document
To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.
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Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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Salesforce JavaScript-Developer-I日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing | 7% | - Test coverage and reliability - Unit testing concepts - Test effectiveness evaluation - Writing and modifying unit tests |
| Topic 2: Server Side JavaScript | 8% | - Server-side JavaScript implementations - Core Node.js modules - CLI commands - Package management (npm) - Node.js fundamentals |
| Topic 3: Asynchronous Programming | 13% | - Callbacks - Event loop and execution flow - Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) - Async/Await syntax |
| Topic 4: Objects, Functions, and Classes | 25% | - Variable scope and closures - Higher-order functions - Function declarations and expressions - ES6 classes and inheritance - Prototypal inheritance - Object creation and manipulation - Arrow functions - Modules and decorators - Execution flow and context |
| Topic 5: Variables, Types, and Collections | 23% | - Strings, numbers, and dates - JSON parsing and manipulation - Primitive and complex data types - Variable declarations and initialization - Truthy and falsy evaluations - Type coercion and conversion - Arrays and collections |
| Topic 6: Debugging and Error Handling | 7% | - Breakpoints and code inspection - Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types |
| Topic 7: Browser and Events | 17% | - Browser Developer Tools usage - Event propagation (bubbling and capturing) - DOM manipulation - Interacting with forms and user input - Event handling and listeners - Browser-specific APIs |

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