Salesforce JS-Dev-101 Q&A - in .pdf
- Exam Code: JS-Dev-101
- Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
- Updated: Oct 10, 2026
- Q & A: 149 Questions and Answers
- PDF Price: $59.99
- Printable Salesforce JS-Dev-101 PDF Format. It is an electronic file format regardless of the operating system platform.
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Salesforce JS-Dev-101 Q&A - Testing Engine
- Exam Code: JS-Dev-101
- Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
- Updated: Oct 10, 2026
- Q & A: 149 Questions and Answers
- Install on multiple computers for self-paced, at-your-convenience training.
- PC Test Engine Price: $59.99
- Testing Engine
Salesforce JS-Dev-101 Value Pack (Frequently Bought Together)
- If you purchase Salesforce JS-Dev-101 Value Pack, you will also own the free online test engine.
- PDF Version + PC Test Engine + Online Test Engine
- Value Pack Total: $119.98 $79.99
About Salesforce JS-Dev-101 Exam Actual tests
Two or three regular hours a day beat heroic weekend cramming, and former customers prove it. In 2026, Prep4sureGuide gives JS-Dev-101 candidates Salesforce Certified JavaScript Developer - Multiple Choice practice questions designed for exactly that steady routine.
Salesforce JS-Dev-101 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer - Multiple Choice |
| Exam Number: | JS-Dev-101 |
| Available Languages: | English, Japanese |
| Real Exam Qty: | 60 scored + up to 5 unscored |
| Exam Price: | USD 200 |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Developer |
| Certificate Validity Period: | Does not expire; requires maintenance updates |
| Exam Duration: | 105 minutes |
| Exam Format: | Multiple select, Multiple choice |
| Recommended Training: | Trailhead JavaScript Developer I Certification Prep |
| Exam Registration: | Salesforce Certification Registration |
| Sample Questions: |  |
| 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: Variables, Types, and Collections | 23% | - Variable declaration and scope - Data types, type coercion, truthy/falsy values - JSON parsing and manipulation - Strings, numbers, dates, arrays and methods |
| Topic 2: Objects, Functions, and Classes | 25% | - Object creation, properties, prototypes - Function types, scope, closures, arrow functions - ES6 classes, inheritance, modules, decorators |
| Topic 3: Testing | 7% | - Test coverage and improvement - Unit test structure and effectiveness |
| Topic 4: Browser and Events | 17% | - Browser APIs and developer tools - DOM selection and manipulation - Event handling, propagation, listeners |
| Topic 5: Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks, promises, async/await |
| Topic 6: Debugging and Error Handling | 7% | - Error types and handling strategies - Console usage, breakpoints and debugging techniques |
| Topic 7: Server Side JavaScript | 8% | - Node.js fundamentals and core modules - Package management and CLI tools |
Asked and Answered: Salesforce Certified JavaScript Developer - Multiple Choice
Salesforce Certified JavaScript Developer - Multiple Choice is an official Salesforce exam, registered under the code JS-Dev-101. Passing it earns the Salesforce Certified JavaScript Developer certification at the Intermediate / Specialist level. It also connects to Salesforce Certified Developer, Salesforce Certified Platform Developer I. In a fast-developed industry, this certificate is a promise to your career and your next promotion.
No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity
Vendor policies do evolve, so confirm the current conditions before you register on the official exam page.
The Salesforce Certified JavaScript Developer - Multiple Choice exam contains 60 scored + up to 5 unscored questions within 105 minutes. Former customers share a consistent secret: two or three regular hours of daily practice beat sporadic cramming. The Prep4sureGuide engine covers every important test point, so a steady routine builds both knowledge and the pacing the clock demands.
Passing Salesforce Certified JavaScript Developer - Multiple Choice requires 65%, and the official fee is USD 200. Retakes bill the full USD 200 again, so treat readiness as something to verify, not assume: when your Prep4sureGuide practice scores clear the requirement day after day, you are ready to book.
Registration for Salesforce Certified JavaScript Developer - Multiple Choice runs through the official channels below.
One scheduling detail: the exam is delivered Online proctored or onsite at authorized testing centers.
Yes, Salesforce recommends the following training for Salesforce Certified JavaScript Developer - Multiple Choice candidates.
Whichever training you follow, practice daily with the 149 questions in the Prep4sureGuide JS-Dev-101 package; regular hours with real exam-style items are what turn preparation into a pass.
Salesforce Certified JavaScript Developer - Multiple Choice is divided into 7 official domains, led by Asynchronous Programming (13%), Variables, Types, and Collections (23%), and Testing (7%). The full outline is above; while details shift over time, the main test points stay steady, and we have already sorted them for you.
Yes and yes. If you are a little suspicious, download the free demo of the Salesforce Certified JavaScript Developer - Multiple Choice questions and check the material before deciding. After purchase, updates are free for 365 days, with new versions sent to you as soon as test points change; after expiry, extending the update service costs 50% of the regular price.
We promise it in writing: a 100% money-back guarantee under defined conditions. Take the Salesforce Certified JavaScript Developer - Multiple Choice exam within 60 days of purchase; if you fail, claim a full refund according to your transcript by submitting a scanned enrollment slip and the official Score Report PDF within 2 days of the exam, processed within 7 days. The exam must match your product, candidate and payer names must match, and attempts within 3 days of purchase, unused downloads, free materials, and expired orders are excluded. Alternatively, switch freely to other exam material: two equivalent products, free, with updates retained on your original purchase.
Delivery is instant: files unlock for download at payment and are emailed within one minute, so there is no wasted time between ordering and studying. If nothing arrives within 2 hours, check spam and contact our 24/7 aftersales agents. Installation is unlimited.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Refer to the code below (corrected to use a template literal on line 08):
01 let car1 = new Promise((_, reject) =>
02 setTimeout(reject, 2000, "Car 1 crashed in")
03 );
04 let car2 = new Promise(resolve =>
05 setTimeout(resolve, 1500, "Car 2 completed")
06 );
07 let car3 = new Promise(resolve =>
08 setTimeout(resolve, 3000, "Car 3 completed")
09 );
10
11 Promise.race([car1, car2, car3])
12 .then(value => {
13 let result = `${value} the race.`;
14 })
15 .catch(err => {
16 console.log("Race is cancelled.", err);
17 });
What is the value of result when Promise.race executes?
- A. Car 1 crashed in the race.
- B. Race is cancelled.
- C. Car 2 completed the race.
- D. Car 3 completed the race.
Correct Answer: C 🗳️
Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).
Original code:
01 let requestPromise = client.getRequest;
03 requestPromise().then((response) => {
04 handleResponse(response);
05 });
The developer wants to gracefully handle errors from a Promise-based GET request.
Which code modification is correct?
- A. Use finally handler for errors
- B. try/catch around requestPromise().then(...)
- C. (duplicate of A)
- D. Add .catch to the Promise chain
Correct Answer: D 🗳️
Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).
A developer is asked to fix some bugs reported by users. To do that, the developer adds a breakpoint for debugging.
01 function Car(maxSpeed, color) {
02 this.maxSpeed = maxSpeed;
03 this.color = color;
04 }
05 let carSpeed = document.getElementById('carSpeed');
06 debugger;
07 let fourWheels = new Car(carSpeed.value, 'red');
When the code execution stops at the breakpoint on line 06, which two types of information are available in the browser console?
- A. The style, event listeners and other attributes applied to the carSpeed DOM element
- B. A variable displaying the number of instances created for the Car object
- C. The information stored in the window.localStorage property
- D. The values of the carSpeed and fourWheels variables
Correct Answer: A,C 🗳️
Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).
Refer to the code below (assuming Promise.race is intended):
let cat3 = new Promise(resolve =>
setTimeout(resolve, 3000, "Cat 3 completes")
);
Promise.race([cat1, cat2, cat3])
.then(value => {
let result = `${value} the race.`;
})
.catch(err => {
console.log("Race is cancelled:", err);
});
(Assuming cat1 and cat2 are similar to earlier examples: cat2 resolves fastest.) What is the value of result when Promise.race executes?
- A. Race is cancelled.
- B. Car 2 completed the race.
- C. Car 1 crashed on the race.
- D. Car 3 completed the race.
Correct Answer: B 🗳️
Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).
Refer to the code below:
01 const objBook = {
02 title: 'JavaScript',
03 };
04 Object.preventExtensions(objBook);
05 const newObjBook = objBook;
06 newObjBook.author = 'Robert';
What are the values of objBook and newObjBook respectively?
- A. { author: "Robert" }
{ author: "Robert", title: "JavaScript" } - B. { author: "Robert", title: "JavaScript" }
undefined - C. { author: "Robert", title: "JavaScript" }
{ author: "Robert", title: "JavaScript" } - D. { title: "JavaScript" }
{ title: "JavaScript" }
Correct Answer: D 🗳️
Explanation: Only visible for Prep4sureGuide members. You can sign-up / login (it's free).
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