Download Salesforce : JavaScript-Developer-I Questions & Answers as PDF & Test Software
Updated: Aug 17, 2026
No. of Questions: 149 Questions & Answers with Testing Engine
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JavaScript-Developer-I Practice Q&A's
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Salesforce JavaScript Developer I Certification Path
You must get an idea of exactly what this certification is, before investing your valuable time, effort, or money in Salesforce. The demand and the need for Salesforce certified professionals are rapidly growing and so Salesforce JavaScript Developer I Certification is becoming more and more popular. Different types of online training sessions are provided such as Intellipaat 's online training sessions for the Salesforce JavaScript Developer I Qualification . It is instructor-led teaching by subject professionals working in major organizations. This style of training includes live sessions with the teacher, along with a forum where you can clear all your course-based doubts.
Self-paced sessions are also offered. This training mode involves pre-recorded video sessions. You can conveniently return to these talks and revisit the subjects you have skipped whether you have any difficulties with the lectures or have difficulty keeping up with the online meetings. You will also use these sessions to finish your exercise at your speed while you access these online lessons throughout your life.
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
Salesforce JavaScript-Developer-I Exam Overview:
| Certification Vendor: | Salesforce |
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-101 |
| Certificate Validity Period: | None (Credential does not expire) |
| Related Certifications: | Salesforce Certified JavaScript Developer I Credential |
| Available Languages: | English |
| Exam Duration: | 105 minutes |
| Real Exam Qty: | 60 (plus up to 5 unscored pilot questions) |
| Exam Format: | Multiple-choice, Multiple-select |
| Passing Score: | 65% |
| Exam Price: | $200 USD |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center) |
| Pre Condition: | None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam. |
| Official Syllabus URL: | https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi |
How to book the Salesforce JavaScript-Developer-I Exam
There are the following steps for registering the Salesforce JavaScript Developer I exam. Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method
Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Server Side JavaScript | 8% | - Server-side JavaScript implementations - Core Node.js modules - Package management (npm) - Node.js fundamentals - CLI commands |
| Topic 2: Variables, Types, and Collections | 23% | - Primitive and complex data types - Arrays and collections - Variable declarations and initialization - Strings, numbers, and dates - Type coercion and conversion - JSON parsing and manipulation - Truthy and falsy evaluations |
| Topic 3: Testing | 7% | - Test coverage and reliability - Test effectiveness evaluation - Unit testing concepts - Writing and modifying unit tests |
| Topic 4: Objects, Functions, and Classes | 25% | - Higher-order functions - Execution flow and context - Prototypal inheritance - Function declarations and expressions - Variable scope and closures - ES6 classes and inheritance - Object creation and manipulation - Arrow functions - Modules and decorators |
| Topic 5: Browser and Events | 17% | - Browser-specific APIs - DOM manipulation - Browser Developer Tools usage - Event propagation (bubbling and capturing) - Event handling and listeners - Interacting with forms and user input |
| Topic 6: Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks - Async/Await syntax - Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) |
| Topic 7: Debugging and Error Handling | 7% | - Breakpoints and code inspection - Custom error types - Console methods for debugging - Error handling techniques (try/catch/finally) |
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