How to Study the Salesforce JavaScript-Developer-I Exam
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.
Objects & Arrays: Data Structures
Control of Mistake
Scope of Variables
Conversion type (inclusive versus explicit)
Item Model Document
JavaScript on the backend
Activities
Monitor (agnostic platform)
Strings
Classes
Functions (more functions in higher order)
Forms of data and operators
Modules
Discharge
Asynchronous Programming
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.
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:
- Technical Project Manager
- Salesforce developer
- Software/backend developer
- Support engineer
- Front end developer
- UI/UX Engineer
- Technical Product Manager
- Web application developer
- JavaScript programmer
- Full stack developer
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What is the duration, language, and format of Salesforce JavaScript-Developer-I Exam
- This exam consists of 60 questions
- The type of questions is Multiple Choice and situation-based questions.
- This exam is offered in only English.
- Passing score 65%
- There is a time limit of 105 minutes for the exam.
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 |
|---|---|---|
| Asynchronous Programming | 13% | - Callbacks - Promises (creation, chaining, error handling) - Async/Await syntax - Asynchronous patterns for business requirements - Event loop and execution flow |
| Testing | 7% | - Test coverage and reliability - Unit testing concepts - Test effectiveness evaluation - Writing and modifying unit tests |
| Browser and Events | 17% | - DOM manipulation - Event handling and listeners - Browser Developer Tools usage - Event propagation (bubbling and capturing) - Browser-specific APIs - Interacting with forms and user input |
| Server Side JavaScript | 8% | - Server-side JavaScript implementations - Core Node.js modules - Package management (npm) - CLI commands - Node.js fundamentals |
| Variables, Types, and Collections | 23% | - Variable declarations and initialization - Strings, numbers, and dates - JSON parsing and manipulation - Arrays and collections - Type coercion and conversion - Primitive and complex data types - Truthy and falsy evaluations |
| Objects, Functions, and Classes | 25% | - Object creation and manipulation - Variable scope and closures - Higher-order functions - Modules and decorators - ES6 classes and inheritance - Function declarations and expressions - Prototypal inheritance - Arrow functions - Execution flow and context |
| Debugging and Error Handling | 7% | - Custom error types - Console methods for debugging - Error handling techniques (try/catch/finally) - Breakpoints and code inspection |






