Today, the Salesforce JS-Dev-101 exam is one of the most taken certification tests in IT — and the certificate it awards is a passport to better jobs and better futures. PassCollection gets you there with 149 practice questions for the JS-Dev-101 exam, written by IT experts who devote themselves to the craft.
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing | 7% | - Unit test structure and effectiveness - Test coverage and improvement |
| Topic 2: Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks, promises, async/await |
| Topic 3: Variables, Types, and Collections | 23% | - Data types, type coercion, truthy/falsy values - JSON parsing and manipulation - Variable declaration and scope - Strings, numbers, dates, arrays and methods |
| Topic 4: Objects, Functions, and Classes | 25% | - Object creation, properties, prototypes - Function types, scope, closures, arrow functions - ES6 classes, inheritance, modules, decorators |
| Topic 5: Browser and Events | 17% | - DOM selection and manipulation - Event handling, propagation, listeners - Browser APIs and developer tools |
| Topic 6: Server Side JavaScript | 8% | - Package management and CLI tools - Node.js fundamentals and core modules |
| Topic 7: Debugging and Error Handling | 7% | - Error types and handling strategies - Console usage, breakpoints and debugging techniques |
About the Salesforce Certified JavaScript Developer - Multiple Choice Exam: Clear Answers
No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity These requirements are set by Salesforce and can change, so confirm the current rules on the official exam page: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101 before registering for the Salesforce Certified JavaScript Developer - Multiple Choice exam.
Delivery is instant: your JS-Dev-101 product is emailed within one minute of payment — download the attachment and start. If nothing arrives within 2 hours, check spam and contact support for an immediate resend. On failure: sit the corresponding JS-Dev-101 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 completes within 7 days. The policy covers the corresponding exam only; attempts within 3 days of purchase, exams never actually taken, free materials, and expired orders are excluded, and the candidate name must match the payer name. If you prefer, exchange your product for two free exam products of equal value and keep the update service on the original.
Registration runs through Salesforce's official channels:
The exam is delivered via Online proctored or onsite at authorized testing centers, so pick the option that fits you when booking.
The Salesforce Certified JavaScript Developer - Multiple Choice exam contains 60 scored + up to 5 unscored questions within 105 minutes. The ratio is the real challenge — content alone does not finish the exam, pacing does. Run full timed sessions in the PassCollection test engine until finishing early feels normal on the real JS-Dev-101 exam.
These are the vendor's recommended training options:
Training builds the theory; the 149 practice questions for the JS-Dev-101 exam from PassCollection test it under real exam conditions.
Salesforce spreads the Salesforce Certified JavaScript Developer - Multiple Choice syllabus over 7 areas, led by Asynchronous Programming (13%), Server Side JavaScript (8%), Objects, Functions, and Classes (25%). Study proportionally to those shares — the complete outline is in the section above this page.
The JS-Dev-101 exam is Salesforce's official certification test — passing it earns the Salesforce Certified JavaScript Developer credential at the Intermediate / Specialist level. It measures practical IT ability objectively, which is why employers treat the Salesforce Certified JavaScript Developer - Multiple Choice certificate as a reliable signal — and why candidate numbers keep growing. It also relates to Salesforce Certified Developer, Salesforce Certified Platform Developer I, extending its value further.
Each Salesforce Certified JavaScript Developer - Multiple Choice attempt costs USD 200, with 65% as the pass mark. A retake charges the full fee again, so the smart move is arriving overprepared. Practice with PassCollection until your timed mock scores clear 65% comfortably, then book the JS-Dev-101 exam once.
Yes — PassCollection offers a free demo of the Salesforce Certified JavaScript Developer - Multiple Choice questions, including a part of the material, so you can download and judge before you decide. After purchase, 365 days of free updates are included; once the year ends, extend the update service at a 50% discount from your member zone.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Given the following code:
let x = ('15' + 10) * 2;
What is the value of x?
- A. 1520
- B. 50
- C. 3020
- D. 35
Correct Answer: C 🗳️
Explanation: Only visible for PassCollection members. You can sign-up / login (it's free).
Which statement accurately describes the behavior of the async/await keywords?
- A. The associated function is asynchronous, but acts like synchronous code.
- B. The associated class contains some asynchronous functions.
- C. The associated function can only be called via asynchronous methods.
- D. The associated function sometimes returns a promise.
Correct Answer: A 🗳️
Explanation: Only visible for PassCollection members. You can sign-up / login (it's free).
Refer to the code below:
01 async function functionUnderTest(isOK) {
02 if (isOK) return 'OK';
03 throw new Error('not OK');
04 }
Which assertion accurately tests the above code?
- A. console.assert(functionUnderTest(true), 'OK')
- B. console.assert(await functionUnderTest(true), 'OK')
- C. console.assert(await functionUnderTest(true), 'not OK')
- D. console.assert(await (functionUnderTest(true), 'not OK'))
Correct Answer: B 🗳️
Explanation: Only visible for PassCollection members. You can sign-up / login (it's free).
Code:
01 let array = [1, 2, 3, 4, 4, 5, 4, 4];
02 for (let i = 0; i < array.length; i++) {
03 if (array[i] === 4) {
04 array.splice(i, 1);
05 i--;
06 }
07 }
What is the value of array after execution?
- A. [1,2,3,4,4,5,4]
- B. [1,2,3,5]
- C. [1,2,3,4,5,4]
- D. [1,2,3,4,5,4,4]
Correct Answer: B 🗳️
Explanation: Only visible for PassCollection 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 rejected
- B. When resolved or rejected
- C. When resolved
- D. When resolved and settled
Correct Answer: B 🗳️
Explanation: Only visible for PassCollection members. You can sign-up / login (it's free).
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