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Salesforce Certified JavaScript Developer - Multiple Choice : JS-Dev-101
Exam Code: JS-Dev-101
Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
Updated: Nov 05, 2026
Q & A: 149 Questions and Answers
JS-Dev-101 Free Demo download
Free demo, instant email delivery, three formats, a full year of free updates, 7x24 support, and a written refund policy — PassTorrent covers the whole Salesforce Certified JavaScript Developer - Multiple Choice journey end to end. What remains is your move: start the 149 practice questions for the JS-Dev-101 exam today.
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Debugging and Error Handling | 7% | - Logging strategies and debugging techniques - try-catch blocks |
| Topic 2: Objects, Functions, and Classes | 25% | - Higher-order functions and closures - Object creation, properties, and prototypal inheritance - Function declarations, expressions, and arrow functions - JavaScript modules (export, import) - ES6 Classes, constructors, methods, and inheritance |
| Topic 3: Browser and Events | 17% | - DOM manipulation - Event handling, propagation, bubbling, and capturing - Browser Developer Tools |
| Topic 4: Server Side JavaScript | 8% | - Node.js applications - Modules and file operations - Salesforce API integration |
| Topic 5: Variables, Types, and Collections | 23% | - Type coercion and type conversion - Variable declaration (var, let, const, scoping, hoisting) - JSON parsing and stringification - String manipulation and Date objects - Array manipulation (map, filter, reduce, forEach, find) |
| Topic 6: Asynchronous Programming | 13% | - Event loop and asynchronous code execution - Callback patterns - Promises and async/await |
| Topic 7: Testing | 7% | - Automated testing strategies - Test-driven development principles - Unit testing with Jest |
JS-Dev-101 Exam Essentials: Your Questions Answered
The Salesforce Certified JavaScript Developer - Multiple Choice exam spans 7 domains, and they are not weighted equally. The top areas are Browser and Events — 17%, Variables, Types, and Collections — 23%, Server Side JavaScript — 8%. Budget your study hours to match those weights; the full domain list is in the outline section further up this page.
The JS-Dev-101 exam is Salesforce's official certification test, and passing it earns the Salesforce Developers credential at the Elementary level. In career terms, it is verified proof of skill — the kind that moves you up the shortlist when your company works with Salesforce technologies, or when you apply to one that does. The same track also includes Salesforce Certified JavaScript Developer I, Lightning Web Components Specialist Superbadge, so this exam can anchor a longer certification plan.
You pass the Salesforce Certified JavaScript Developer - Multiple Choice exam at 65%, and each attempt costs $200 USD — fail, and that fee is due again in full for the retake. Treat mock exams as insurance: keep practicing with PassTorrent until your scores sit comfortably above 65% twice in a row, then schedule the real JS-Dev-101 exam.
Please do. PassTorrent offers a free demo download for the Salesforce Certified JavaScript Developer - Multiple Choice exam — grab it from the product page or leave your email and we will send it over. Purchases come with 365 days of free updates; after that year, extending the update service costs 50% of the original price in your member zone.
The Salesforce Certified JavaScript Developer - Multiple Choice exam packs 60 (plus up to 5 unscored pilot questions) questions into 105 minutes. That ratio leaves almost no room for stalling, so time management is a trained skill, not luck. Our suggestion: rehearse full-length timed sessions in the PassTorrent engine, learn to park a question and return later, and walk into the JS-Dev-101 exam with a pacing plan already rehearsed.
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 Salesforce revises these rules from time to time, confirm the current prerequisites on the official exam page (https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi) before booking your Salesforce Certified JavaScript Developer - Multiple Choice exam.
Delivery is effectively instant: your JS-Dev-101 download link is emailed within one minute of payment, with no cap on how many computers you install it on. If the email has not shown up within 2 hours, check spam and contact our 7x24 support — we reply quickly and resend immediately. If you fail the Salesforce Certified JavaScript Developer - Multiple Choice exam itself, the refund policy applies when you took the corresponding exam within 60 days of purchase: submit a scanned enrollment slip and the official Score Report PDF within 2 days after the exam, and the refund is processed within 7 days. Not covered: attempts within 3 days of purchase, exams never actually taken, free materials, and expired orders — and the candidate name must match the payer name. Prefer material over money? Exchange for two free exam products of equal value and keep the update service on your original purchase.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Question #1
Given the code below:
01 setCurrentUrl();
02 console.log("The current URL is: " + url);
03
04 function setCurrentUrl() {
05 url = window.location.href;
06 }
What happens when the code executes?
- A. The url variable has global scope and line 02 executes correctly.
- B. The url variable has local scope and line 02 executes correctly.
- C. The url variable has global scope and line 02 throws an error.
- D. The url variable has local scope and line 02 throws an error.
Correct Answer: A 🗳️
Explanation: Only visible for PassTorrent members. You can sign-up / login (it's free).
Question #2
A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named msg is declared and assigned a value on line 03.
function getAvailabilityMessage(item) {
if (getAvailability(item)) {
var msg = "Username available";
return msg;
}
}
- A. "msg is not defined"
- B. undefined
- C. "Username available"
- D. "newUserName"
Correct Answer: C 🗳️
Explanation: Only visible for PassTorrent members. You can sign-up / login (it's free).
Question #3
A developer has a fizzbuzz function that, when passed in a number, returns the following:
'fizz' if the number is divisible by 3.
'buzz' if the number is divisible by 5.
'fizzbuzz' if the number is divisible by both 3 and 5.
Empty string '' if the number is divisible by neither 3 nor 5.
Which two test cases properly test scenarios for the fizzbuzz function?
- A. let res = fizzbuzz(3);
console.assert(res === ''); - B. let res = fizzbuzz(5);
console.assert(res === 'fizz'); - C. let res = fizzbuzz(true);
console.assert(res === ''); - D. let res = fizzbuzz(15);
console.assert(res === 'fizzbuzz');
Correct Answer: C,D 🗳️
Explanation: Only visible for PassTorrent members. You can sign-up / login (it's free).
Question #4
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 5 to function world() {
- B. Change line 7 to }();
- C. Change line 9 to sayHello(world)();
- D. Change line 2 to console.log('Hello', name());
Correct Answer: D 🗳️
Explanation: Only visible for PassTorrent members. You can sign-up / login (it's free).
Question #5
A developer is setting up a Node.js server and is creating a script at the root of the source code, index.js, that will start the server when executed. The developer declares a variable that needs the folder location that the code executes from.
Which global variable can be used in the script?
- A. this.path
- B. __filename
- C. __dirname
- D. window.location
Correct Answer: C 🗳️
Explanation: Only visible for PassTorrent members. You can sign-up / login (it's free).
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