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Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Testing | 7% | - Test-driven development principles - Automated testing strategies - Unit testing with Jest |
| Objects, Functions, and Classes | 25% | - JavaScript modules (export, import) - Higher-order functions and closures - Function declarations, expressions, and arrow functions - ES6 Classes, constructors, methods, and inheritance - Object creation, properties, and prototypal inheritance |
| Asynchronous Programming | 13% | - Promises and async/await - Event loop and asynchronous code execution - Callback patterns |
| Browser and Events | 17% | - DOM manipulation - Browser Developer Tools - Event handling, propagation, bubbling, and capturing |
| Server Side JavaScript | 8% | - Node.js applications - Salesforce API integration - Modules and file operations |
| Variables, Types, and Collections | 23% | - JSON parsing and stringification - Array manipulation (map, filter, reduce, forEach, find) - Variable declaration (var, let, const, scoping, hoisting) - Type coercion and type conversion - String manipulation and Date objects |
| Debugging and Error Handling | 7% | - Logging strategies and debugging techniques - try-catch blocks |
JS-Dev-101 Exam FAQ: Lean Content, Real Practice
Online (Proctored) Register for the Salesforce Certified JavaScript Developer - Multiple Choice exam through these official channels:
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The official Salesforce Certified JavaScript Developer - Multiple Choice outline defines 7 domains. The leading three are Variables, Types, and Collections (23%), Debugging and Error Handling (7%), and Objects, Functions, and Classes (25%). The full list is in the topics section above, and GuideTorrent's 149 practice questions cover each one.
The Salesforce Certified JavaScript Developer - Multiple Choice exam contains 60 (plus up to 5 unscored pilot questions) to complete within 105 minutes. Timed simulation in the GuideTorrent Desktop Test Engine teaches that rhythm before exam day does.
The JS-Dev-101 exam is a Salesforce certification exam validating the Salesforce Certified JavaScript Developer - Multiple Choice syllabus shown above. It belongs to these credential paths: Salesforce Certified JavaScript Developer I, Lightning Web Components Specialist Superbadge. Candidates in 2026 start with GuideTorrent's 149 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.
Completion of the Lightning Web Components Specialist Superbadge is required to earn the full credential, though it can be completed before or after the exam. Since requirements change over time, confirm the latest on the official Salesforce exam page before scheduling.
The Salesforce Certified JavaScript Developer - Multiple Choice exam requires 65% to pass, and registration costs $200 USD. A failed attempt means paying the same fee again — a readiness check with the GuideTorrent engines before booking is the cheaper option.
Salesforce recommends these training resources for the Salesforce Certified JavaScript Developer - Multiple Choice exam:
Follow the training with steady self-testing — the 149 practice questions from GuideTorrent help you apply theory and fill any gaps the training leaves.
Three versions of the same study materials: a printable, expert-prepared PDF with free demo download and instant access; a Desktop Test Engine for Windows with customizable simulation and timed modes that works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS with test history and performance review. All 149 practice questions are identical across versions. Every purchase includes 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Given the following code:
let x = ('15' + 10) * 2;
What is the value of x?
- A. 35
- B. 1520
- C. 50
- D. 3020
Correct Answer: D 🗳️
Explanation: Only visible for GuideTorrent members. You can sign-up / login (it's free).
Refer to the code below:
01 function myFunction(reassign) {
02 let x = 1;
03 var y = 1;
04
05 if (reassign) {
06 let x = 2;
07 var y = 2;
08 console.log(x);
09 console.log(y);
10 }
11
12 console.log(x);
13 console.log(y);
14 }
What is displayed when myFunction(true) is called?
- A. 2 2 2 2
- B. 2 2 1 2
- C. 2 2 undefined undefined
- D. 2 2 1 1
Correct Answer: B 🗳️
Explanation: Only visible for GuideTorrent members. You can sign-up / login (it's free).
Refer to the code below:
class Student {
constructor(name) {
this._name = name;
}
displayGrade() {
console.log(`${this._name} got 70% on test.`);
}
}
class GraduateStudent extends Student {
constructor(name) {
super(name);
this._name = "Graduate Student " + name;
}
displayGrade() {
console.log(`${this._name} got 100% on test.`);
}
}
let student = new GraduateStudent("Jane");
student.displayGrade();
What is the console output?
- A. Jackie got 70% on test.
- B. Better student Jackie got 70% on test.
- C. Uncaught ReferenceError
- D. Graduate Student Jane got 100% on test.
Correct Answer: D 🗳️
Explanation: Only visible for GuideTorrent members. You can sign-up / login (it's free).
01 function changeValue(obj) {
02 obj.value = obj.value / 2;
03 }
04 const objA = { value: 10 };
05 const objB = objA;
06
07 changeValue(objB);
08 const result = objA.value;
What is the value of result?
- A. 5
- B. undefined
- C. 10
- D. NaN
Correct Answer: A 🗳️
Explanation: Only visible for GuideTorrent members. You can sign-up / login (it's free).
Refer to the code below:
01 const server = require('server');
02
03 // Insert code here
A developer imports a library that creates a web server. The imported library uses events and callbacks to start the server.
Which code should be inserted at line 03 to set up an event and start the web server?
- A. server.on('connect', (port) => { console.log('Listening on', port); });
- B. server((port) => { console.log('Listening on', port); });
- C. server.start();
- D. server();
Correct Answer: B 🗳️
Explanation: Only visible for GuideTorrent members. You can sign-up / login (it's free).
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