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Still valid 100% used dump.The Q&As dumps was spot on!
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Salesforce Certified JavaScript Developer (JS-Dev-101): JavaScript-Developer-I Exam
"Salesforce Certified JavaScript Developer (JS-Dev-101)", also known as JavaScript-Developer-I exam, is a Salesforce Certification. With the complete collection of questions and answers, BraindumpsPass has assembled to take you through 149 Q&As to your JavaScript-Developer-I Exam preparation. In the JavaScript-Developer-I exam resources, you will cover every field and category in Salesforce Developer Certification helping to ready you for your successful Salesforce Certification.
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- Exam Code: JavaScript-Developer-I
- Exam Name: Salesforce Certified JavaScript Developer (JS-Dev-101)
- Certification Provider: Salesforce
- Corresponding Certification: Salesforce Developer
- Updated: Oct 17, 2026
- No. of Questions: 149 Questions & Answers with Testing Engine
- Download Limit: Unlimited
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JavaScript-Developer-I Practice Q&A's
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Topics of Salesforce JavaScript Developer I Exam
Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts Salesforce JavaScript-Developer-I exam will include the following topics:
1. Variable, Types, and Collection: 23%
Scenario based coding Variables Creation and Initialization JSON object understanding
2. Object, Functions, and Classes: 25%
Implementation of different functions Understanding of different modules of Javascript Scope of variables and their execution flow
3. Browser and Events: 17%
Handling and propagation of events Development tools of browsers Understanding of browser specific APIs
4. Asynchronous Programming: 13%
Asynchrounous programming different concepts Monitoring and management of different loops
5. Server Side Javascript: 8%
Implementation of Node.js Understanding of Node.js CLI commands
6. Testing: 7%
Unit Testing effectiveness of different tests
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 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
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Salesforce JavaScript-Developer-I Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Server-Side JavaScript | 8% | - Module system and require/import - Node.js fundamentals and runtime - Core Node.js modules - Command-line tools and scripts |
| Topic 2: Objects, Functions, and Classes | 25% | - Decorators and advanced function patterns - Modules and imports/exports - Object creation, properties, and methods - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Closures and execution context |
| Topic 3: Asynchronous Programming | 13% | - Async/await syntax - Callbacks and callback hell - Promises and chaining - Event loop and micro/macro tasks - Fetch API and HTTP requests |
| Topic 4: Debugging and Error Handling | 7% | - Defensive programming practices - Console methods and logging - Debugging tools and breakpoints - Error types and exception handling |
| Topic 5: Browsers and Events | 17% | - Browser APIs and Web Storage - Event handling, propagation, and delegation - Script loading and execution order - Document Object Model (DOM) manipulation - Window and document object properties |
| Topic 6: Variables, Types, and Collections | 23% | - JSON parsing and usage - Type coercion and conversion rules - Variable declaration and initialization - Array methods and data manipulation - Working with strings, numbers, dates, and booleans - Truthy and falsy values |
| Topic 7: Testing | 7% | - Unit testing concepts - Code coverage and best practices - Testing frameworks and assertions - Test doubles and mocks |
Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions:
A developer wants to use a module called DatePrettyPrint.
This module exports one default function called printDate().
How can the developer import and use printDate()?
- A. import DatePrettyPrint() from ' /path/DatePrettyPrint.js ' ;
printDate(); - B. import DatePrettyPrint from ' /path/DatePrettyPrint.js ' ;
DatePrettyPrint.printDate(); - C. import printDate from ' /path/DatePrettyPrint.js ' ;
printDate(); - D. import printDate from ' /path/DatePrettyPrint.js ' ;
DatePrettyPrint.printDate();
Correct Answer: C 🗳️
Explanation: Only visible for BraindumpsPass members. You can sign-up / login (it's free).
A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?
- A. Cookies are read and the key value is set, the remaining cookies are unaffected.
- B. Cookies are read, but the key value is not set because the value is not URL encoded.
- C. Cookies are read and the key value is set, and all cookies are wiped.
- D. Cookies are not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.
Correct Answer: A 🗳️
Explanation: Only visible for BraindumpsPass members. You can sign-up / login (it's free).
Code:
01 const sayHello = (name) = > {
02 console.log( ' Hello ' , name);
03 };
04
05 const world = () = > {
06 return ' World ' ;
07 };
08
09 sayHello(world);
This does not print " Hello World " .
What change is needed?
- A. Change line 9 to sayHello(world)();
- B. Change line 5 to function world() {
- C. Change line 2 to console.log( ' Hello ' , name());
- D. Change line 7 to }();
Correct Answer: C 🗳️
Explanation: Only visible for BraindumpsPass members. You can sign-up / login (it's free).
Given the code below:
01 function Person() {
02 this.firstName = ' John ' ;
03 }
04
05 Person.proto = {
06 job: x = > ' Developer '
07 });
08
09 const myFather = new Person();
10 const result = myFather.firstName + ' ' + myFather.job();
What is the value of result when line 10 executes?
- A. Error: myFather.job is not a function
- B. undefined Developer
- C. John undefined
- D. John Developer
Correct Answer: A 🗳️
Explanation: Only visible for BraindumpsPass members. You can sign-up / login (it's free).
Refer to the following code:
01 let obj = {
02 foo: 1,
03 bar: 2
04 }
05 let output = []
06
07 for (let something of obj) {
08 output.push(something);
09 }
10
11 console.log(output);
What is the value of output on line 11?
- A. [ " foo " , " bar " ]
- B. [1, 2]
- C. An error will occur due to the incorrect usage of the for_of statement on line 07.
- D. [ " foo:1 " , " bar:2 " ]
Correct Answer: C 🗳️
Explanation: Only visible for BraindumpsPass members. You can sign-up / login (it's free).
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