Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developers
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Updated: Sep 22, 2026
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- Total Questions: 149
- Updated on: Sep 22, 2026
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- Total Questions: 149
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The JS-Dev-101 exam has a reputation for tripping up even experienced professionals, and the Salesforce Certified JavaScript Developer - Multiple Choice blueprint keeps getting broader. Rather than guessing what matters, work through the 149 practice questions 2Pass4sure has built around the current exam and walk in knowing the format cold.
Salesforce JS-Dev-101 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer - Multiple Choice |
| Exam Number: | JS-Dev-101 |
| Passing Score: | 65% |
| Available Languages: | Japanese, English |
| Related Certifications: | Salesforce Certified Developer Salesforce Certified Platform Developer I |
| Exam Duration: | 105 minutes |
| Exam Price: | USD 200 |
| Exam Format: | Multiple select, Multiple choice |
| Certificate Validity Period: | Does not expire; requires maintenance updates |
| Real Exam Qty: | 60 scored + up to 5 unscored |
| Recommended Training: | Trailhead JavaScript Developer I Certification Prep |
| Exam Registration: | Salesforce Certification Registration |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Online proctored or onsite at authorized testing centers |
| Pre Condition: | No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity |
| Official Syllabus URL: | https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101 |
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Browser and Events | 17% | - DOM selection and manipulation - Event handling, propagation, listeners - Browser APIs and developer tools |
| Topic 2: Variables, Types, and Collections | 23% | - Variable declaration and scope - JSON parsing and manipulation - Strings, numbers, dates, arrays and methods - Data types, type coercion, truthy/falsy values |
| Topic 3: Server Side JavaScript | 8% | - Package management and CLI tools - Node.js fundamentals and core modules |
| Topic 4: Asynchronous Programming | 13% | - Callbacks, promises, async/await - Event loop and execution flow |
| Topic 5: Objects, Functions, and Classes | 25% | - Function types, scope, closures, arrow functions - ES6 classes, inheritance, modules, decorators - Object creation, properties, prototypes |
| Topic 6: Debugging and Error Handling | 7% | - Console usage, breakpoints and debugging techniques - Error types and handling strategies |
| Topic 7: Testing | 7% | - Unit test structure and effectiveness - Test coverage and improvement |
Answers to the Most Common Questions About Salesforce Certified JavaScript Developer - Multiple Choice
The JS-Dev-101 exam is the official Salesforce exam for Salesforce Certified JavaScript Developer - Multiple Choice. Passing it earns you the Salesforce Certified JavaScript Developer credential, which sits at the Intermediate / Specialist level. It is also connected to Salesforce Certified Developer, Salesforce Certified Platform Developer I, so what you learn carries over if you plan to pursue those paths as well. Employers treat the certification as verified proof of skill, which is why structured preparation with 2Pass4sure's practice questions pays off.
The JS-Dev-101 exam contains 60 scored + up to 5 unscored questions, and the time limit is 105 minutes. Translate that into a pacing plan before exam day: know roughly how long you can afford per item, flag anything that stalls you, and circle back at the end instead of burning minutes. Two or three full timed sessions in 2Pass4sure's test engine will teach you that rhythm far better than untimed reading ever will.
The passing score for the JS-Dev-101 exam is 65%, and the official registration fee is USD 200. Remember that a failed attempt means paying that fee again in full for a retake, so treat self-assessment as part of the budget: run 2Pass4sure's practice questions under timed conditions and only book your seat once your scores sit comfortably above the passing bar.
No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity Eligibility details can change, so before you register, confirm the current requirements on the official exam page: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101.
You can book the JS-Dev-101 exam through the official registration channels below:
Exam delivery method: Online proctored or onsite at authorized testing centers.
Salesforce points candidates to the following official training options:
Once the coursework has built your foundation, the fastest way to turn theory into exam readiness is drilling with 2Pass4sure's 149 practice questions for the Salesforce Certified JavaScript Developer - Multiple Choice exam.
Yes. 2Pass4sure offers a free PDF demo of the Salesforce Certified JavaScript Developer - Multiple Choice practice questions on the samples page, so you can judge the format and quality yourself before paying anything. Every purchase also includes 365 days of free updates, and after the product expires you can extend the update service at a 50% discount from within your member zone.
If you take the corresponding exam within 60 days of purchase and do not pass, 2Pass4sure backs you with a 100% money-back guarantee. To claim it, submit a scanned copy of your exam enrollment slip together with your official Score Report PDF within 2 days of the exam, and the refund is processed within 7 days. The guarantee does not apply to attempts made within the first 3 days after purchase, to products downloaded without actually sitting the exam, or to free materials and expired orders, and the candidate name must match the payer's name. If you would rather have study material than money, you can instead exchange for two additional exam products of equal value, free of charge, while keeping the update service on your original purchase. Delivery itself is instant: your download is available right after payment and a copy reaches your mailbox within one minute — if nothing arrives within 2 hours, contact customer service. You may install the product on as many computers as you need.
The official Salesforce Certified JavaScript Developer - Multiple Choice blueprint is organized into 7 domains. The leading areas are:
- Asynchronous Programming — 13% of the exam
- Debugging and Error Handling — 7% of the exam
- Browser and Events — 17% of the exam
For the complete domain-by-domain breakdown with every subtopic, see the Exam Topics outline above.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
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 not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.
- C. Cookies are read and the key value is set, and all cookies are wiped.
- D. Cookies are read, but the key value is not set because the value is not URL encoded.
Correct Answer: A 🗳️
Explanation: Only visible for 2Pass4sure members. You can sign-up / login (it's free).
HTML:
<p> The current status of an Order: <span id="status"> In Progress </span> </p> Which JavaScript statement changes 'In Progress' to 'Completed'?
- A. document.getElementById("status").innerHTML = 'Completed';
- B. document.getElementById(".status").innerHTML = 'Completed';
- C. document.getElementById("#status").innerHTML = 'Completed';
- D. document.getElementById("status").Value = 'Completed';
Correct Answer: A 🗳️
Explanation: Only visible for 2Pass4sure members. You can sign-up / login (it's free).
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. Installs with its own package manager to install and manage third-party libraries.
- B. Performs a static analysis on code before execution to look for runtime errors.
- C. Ensures stability with one major release every few years.
- D. Executes server-side JavaScript code to avoid learning a new language.
- E. Uses non-blocking functionality for performant request handling.
Correct Answer: A,D,E 🗳️
Explanation: Only visible for 2Pass4sure members. You can sign-up / login (it's free).
Refer to the code below:
01 new Promise((resolve, reject) => {
02 const fraction = Math.random();
03 if (fraction > 0.5) reject('fraction > 0.5, ' + fraction);
04 resolve(fraction);
05 })
06 .then(() => console.log('resolved'))
07 .catch((error) => console.error(error))
08 .finally(() => console.log('when am I called?'));
When does Promise.finally on line 08 get called?
- A. When resolved or rejected
- B. When resolved
- C. When resolved and settled
- D. When rejected
Correct Answer: A 🗳️
Explanation: Only visible for 2Pass4sure members. You can sign-up / login (it's free).
Refer to the code below:
<html>
<body>
<div id="logo">Hello Logo!</div>
<button id="test">Click me</button>
</body>
<script>
function printMessage(event) {
console.log('This is a test message');
}
let el = document.getElementById('test');
el.addEventListener("click", printMessage, false);
</script>
</html>
Which action should be done?
- A. Add event.removeEventListener(); to printMessage function
- B. Add event.removeEventListener(); to window.onload event handler
- C. Add event.stopPropagation(); to printMessage function
- D. Add event.stopPropagation(); to window.onload event handler
Correct Answer: C 🗳️
Explanation: Only visible for 2Pass4sure members. You can sign-up / login (it's free).
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