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Salesforce Certified JavaScript Developer (JS-Dev-101) : JavaScript-Developer-I Exam Questions
- Exam Code: JavaScript-Developer-I
- Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
- Updated: Nov 04, 2026
- Q&As: 149 Questions and Answers
About Salesforce Certified JavaScript Developer (JS-Dev-101) Exam Braindumps
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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
Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101
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.
- There is a time limit of 105 minutes for the exam.
- Passing score 65%
Introduction to Salesforce JavaScript Developer I Exam
The credential Salesforce Accredited JavaScript Developer I is meant for applicants who build JavaScript applications for the web stack on the front-end and/or back-end.This validates both key JavaScript expertise and functional skills for applicants, for example, Lightning Components Platform, and Lightning Web Component technology relevant to JavaScript. Lightning web elements are personalised HTML elements that are designed with traditional HTML and modern JavaScript.
The Salesforce JavaScript Developer I certification requires two parts: the multiple-choice test given by the JavaScript Developer I and the Superbadge Lightning Web Components. In any order, all these credentials can be accessed. A Salesforce Certified Javascript Developer I certification is immediately obtained by adding these two certificates. The qualification applicant for Salesforce JavaScript Accredited Developer I will use the JavaScript language to build front-end or back-end software in one or more frameworks. The applicant will plan, build and evaluate effective , safe and reusable solutions.
The candidate can use JavaScript-specific programming style patterns and can use CSS , HTML, and other languages for integrating JavaScript. With Lightning Web Components, any JavaScript developer can build on Salesforce easily. This means that millions of JavaScript developers around the world will code on Salesforce without learning anything new. Developers can create and deploy brand-new fast apps on Salesforce using the current Lightning Platform development services portfolio and the modern JavaScript language. Salesforce JavaScript Developer I Certificate from Salesforce is designed to help Salesforce partners, customers and employees working on JavaScript as well as the Lightning Component Platform, know-how and knowledge and creation of Lightning web components (LWC's).
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How to Prepare for Salesforce JavaScript Developer I Exam
Preparation Guide for Salesforce JavaScript Developer I Exam
Introduction
Salesforce is a solution for managing customer relationships that unite customers and companies. This is an interactive CRM platform that provides a single, shared view of every client in all the divisions including marketing, distribution, exchange, and operation. Provide the clients with the individual experience Salesforce demand 360 product via the Integrated CRM Platform. It delivers solid and related goods to boost marketing, revenue, exchange, operation, IT, and more. Salesforce is a digital cloud computing (SaaS) firm specializing in the management of client relationships (CRMs). There was a mistake. The app is now the number one of consumer satisfaction and allows organizations to track customer behavior, advertise to consumers, and more. Salesforce is common because it is bundled with features such as contact management, workflow development, task management, incentive monitoring, teamwork tools, customer experience tools, analytics, and interactive, smartphone dashboard.
Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| JavaScript Language Fundamentals | - Data types, variables, and operators - Functions, scope, and closures - ES6+ syntax and features |
| Browser and DOM Interaction | - DOM manipulation and traversal - Browser APIs (fetch, storage, timers) - Event handling and propagation |
| Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| Asynchronous JavaScript | - Event loop and concurrency model - Error handling in async workflows - Promises and async/await |
| Salesforce Platform Integration | - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage |
Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions:
Question #1
Refer to the code:
const pi = 3.1415926;
What is the data type of pi?
- A. Number
- B. Decimal
- C. Float
- D. Double
Correct Answer: A 🗳️
Explanation: Only visible for VCEPrep members. You can sign-up / login (it's free).
Question #2
Refer to the code below:
let productSKU = ' 8675309 ' ;
A developer has a requirement to generate SKU numbers that are always 19 characters long, starting with ' sku ' , and padded with zeros.
Which statement assigns the value sku000000008675309?
- A. productSKU = productSKU.padStart(16, ' 0 ' ).padStart(19, ' sku ' );
- B. productSKU = productSKU.padEnd(16, ' 0 ' ).padStart(19, ' sku ' );
- C. productSKU = productSKU.padEnd(16, ' 0 ' ).padStart( ' sku ' );
- D. productSKU = productSKU.padStart(19, ' 0 ' ).padStart( ' sku ' );
Correct Answer: A 🗳️
Explanation: Only visible for VCEPrep members. You can sign-up / login (it's free).
Question #3
Why does second have access to variable a?
- A. Inner function ' s scope
- B. Hoisting
- C. Outer function ' s scope
- D. Prototype Chain
Correct Answer: C 🗳️
Explanation: Only visible for VCEPrep members. You can sign-up / login (it's free).
Question #4
A developer is trying to convince management that their team will benefit from using Node.js for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
- A. Executes server-side JavaScript code to avoid learning a new language.
- B. Uses non-blocking functionality for performant request handling.
- C. Installs with its own package manager to install and manage third-party libraries.
- D. Performs a static analysis on code before execution to look for runtime errors.
- E. Ensures stability with one major release every few years.
Correct Answer: A,B,C 🗳️
Explanation: Only visible for VCEPrep members. You can sign-up / login (it's free).
Question #5
JavaScript:
01 function Tiger() {
02 this.type = ' Cat ' ;
03 this.size = ' large ' ;
04 }
05
06 let tony = new Tiger();
07 tony.roar = () = > {
08 console.log( ' They\ ' re great! ' );
09 };
10
11 function Lion() {
12 this.type = ' Cat ' ;
13 this.size = ' large ' ;
14 }
15
16 let leo = new Lion();
17 // Insert code here
18 leo.roar();
Which two statements could be inserted at line 17 to enable line 18?
- A. leo.roar = () = > { console.log( ' They\ ' re pretty good! ' ); };
- B. Object.assign(leo, tony);
- C. leo.prototype.roar = () = > { console.log( ' They\ ' re pretty good! ' ); };
- D. Object.assign(leo, Tiger);
Correct Answer: A,B 🗳️
Explanation: Only visible for VCEPrep members. You can sign-up / login (it's free).
Viewing page 1 out of 30 pages.
Viewing questions 1-5 out of 149 questions.
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