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Strings
Asynchronous Programming
JavaScript on the backend
Item Model Document
Scope of Variables
Functions (more functions in higher order)
Classes
Control of Mistake
Modules
Objects & Arrays: Data Structures
Forms of data and operators
Activities
Monitor (agnostic platform)
Conversion type (inclusive versus explicit)
Discharge
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.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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| Section | Weight | Objectives |
|---|---|---|
| Testing | 7% | - Test coverage and reliability - Unit testing concepts - Test effectiveness evaluation - Writing and modifying unit tests |
| Browser and Events | 17% | - Event handling and listeners - DOM manipulation - Interacting with forms and user input - Browser Developer Tools usage - Event propagation (bubbling and capturing) - Browser-specific APIs |
| Objects, Functions, and Classes | 25% | - Higher-order functions - Prototypal inheritance - Execution flow and context - Arrow functions - ES6 classes and inheritance - Modules and decorators - Function declarations and expressions - Object creation and manipulation - Variable scope and closures |
| Debugging and Error Handling | 7% | - Breakpoints and code inspection - Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types |
| Variables, Types, and Collections | 23% | - Arrays and collections - Variable declarations and initialization - Truthy and falsy evaluations - Strings, numbers, and dates - JSON parsing and manipulation - Type coercion and conversion - Primitive and complex data types |
| Asynchronous Programming | 13% | - Callbacks - Asynchronous patterns for business requirements - Event loop and execution flow - Async/Await syntax - Promises (creation, chaining, error handling) |
| Server Side JavaScript | 8% | - Core Node.js modules - Node.js fundamentals - CLI commands - Server-side JavaScript implementations - Package management (npm) |
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