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JS-DEV-101 Exam Topics and Domains
JS-DEV-101 is organized into 7 weighted domains. Expect to work with Node.js, Jest, npm.
Variables, Types, and Collections
Variables and Initialization
Write code to create variables and initialize them correctly (using let, const, and var)
Strings, Numbers, and Dates
Utilize strings, numbers, and dates effectively
Type Coercion
Demonstrate awareness of type coercion and its effects
Truthy and Falsy Evaluations
Distinguish truthy or falsy evaluations
Data Manipulation with Arrays
Demonstrate data manipulation with arrays
JSON Object Operations
Demonstrate how to operate the JSON object
Objects, Functions, and Classes
Function Implementation
Locate the best function implementation for a given scenario
Object Implementation
Apply fundamentals of object implementation to solve business requirements
Class Implementation
Apply fundamentals of class implementation to solve business requirements
Modules
Give examples of how to use a module
Variable Scope and Execution Flow
Analyze the variable scope and the execution flow
Browser and Events
Events, Handlers, and Propagation
Utilize events, handlers, and propagation
DOM Evaluation and Manipulation
Evaluate and manipulate the DOM
Browser Developer Tools
Use Browser Developer Tools for investigation
Browser-Specific APIs
Implement browser-specific APIs
Debugging and Error Handling
Error Handling
Handle errors properly
Debugging Techniques
Apply debugging techniques using the console and breakpoints
Asynchronous Programming
Asynchronous Programming Concepts
Apply asynchronous programming concepts
Event Loop
Understand event loops and their outcomes
Server Side JavaScript
Node.js Implementation
Given a scenario and requirements, infer which Node.js implementation is a good solution
Node.js CLI Commands
Given a scenario and requirements, infer which Node.js CLI command is a good solution
Core Node.js Modules
Know the core Node.js modules and given requirements, infer which Node.js library/framework is a good solution
Node.js Package Management
Given a scenario and requirements, distinguish which Node.js Package Management solution is the most fitting
Testing
Unit Test Evaluation and Improvement
Evaluate the effectiveness of a given unit test and modify it to improve its quality
How do I earn this certification?
Passing JS-DEV-101 earns the Salesforce Certified JavaScript Developer I certification. It sits in the Developer track.
- Platform-Developer-II - Salesforce Certified Platform Developer IIAdvanced Salesforce development concepts including complex business logic, integration, and Lightning component frameworks.
- B2C-Commerce-Developer - Salesforce Certified B2C Commerce Developer Specialization in commerce development leveraging JavaScript skills for Salesforce Commerce Cloud.
- Integration-Architect - Salesforce Certified Integration Architect Advanced integration patterns using APIs and JavaScript-based integrations with the Salesforce platform.
- MuleSoft-Developer-I - MuleSoft Certified Developer - Level 1 API-led integration development complementing JavaScript API consumption skills.
- Marketing-Cloud-Developer - Salesforce Certified Marketing Cloud Developer JavaScript-heavy development within Salesforce Marketing Cloud using AMPscript and SSJS.
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for JS-DEV-101 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
- Lightning Web Components (LWC) Not directly tested on the JS-Dev-101 multiple-choice exam, but the LWC Specialist Superbadge is required for the full certification
- Node.js Core modules, CLI commands, and package management are tested. Current LTS versions and ecosystem changes may influence best practice questions.
- Jest Testing Framework Jest is the primary testing framework referenced in official study materials for the Testing domain.
Who should take this exam?
- 1-2 years of experience as a JavaScript developer
- Experience with multiple JavaScript topics including front-end and/or back-end development
- Ability to use JavaScript in one or more frameworks
- Experience designing, developing, and testing solutions that are performant, maintainable, and reusable