Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developers
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- Total Questions: 149
- Updated on: Oct 14, 2026
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Salesforce JS-Dev-101 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I - Multiple Choice Exam (JS-Dev-101) |
| Exam Number: | JS-Dev-101 |
| Available Languages: | English |
| Exam Format: | Multiple Select Questions, Multiple Choice Questions |
| Passing Score: | 65% |
| Certificate Validity Period: | 1 year (maintenance required annually in Salesforce certification program) |
| Exam Price: | $200 USD |
| Exam Duration: | 105 minutes |
| Related Certifications: | Salesforce Platform Developer II Salesforce Platform Developer I |
| Real Exam Qty: | 60 (multiple choice) |
| Recommended Training: | MDN Web Docs - JavaScript Guide Salesforce Trailhead - JavaScript Developer I |
| Exam Registration: | Kryterion Webassessor (Exam Delivery) Salesforce Certification Registration |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Online proctored exam via Salesforce authorized testing platform (e.g., Webassessor) |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and web development is recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper |
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Object-Oriented JavaScript | - Classes and Inheritance - Objects and Prototypes |
| JavaScript Fundamentals | - Variables, Data Types, and Operators - Control Flow and Error Handling - Functions and Scope |
| Browser and DOM Interaction | - Events and Event Handling - DOM Manipulation |
| Salesforce Platform Integration | - Working with Salesforce Data Models - Lightning Web Components (LWC) Basics |
| Asynchronous Programming | - Callbacks, Promises, and Async/Await - API Calls and Data Fetching |
JS-Dev-101 Exam Facts and Product Details
The JS-Dev-101 exam is one of the hotter assessments from Salesforce, and it leads to the Salesforce Certified JavaScript Developer - Multiple Choice certification — a credential many IT professionals are pursuing right now. Its popularity raises the stakes of preparation: choosing the right study material is a genuinely wise decision, and it is the one fully in your hands.
Automatically, and immediately. The moment a new version of the Salesforce Certified JavaScript Developer - Multiple Choice bank is released, our system sends it straight to your email — your only job is to check your inbox. This update service is free for 365 days from your purchase date, and extending it afterward costs half price with the renewal discount. The JS-Dev-101 exam materials never go stale on you.
Registration for the JS-Dev-101 exam runs through these official channels:
Register when your spare-time practice sessions are producing consistently strong results.
No formal prerequisites, but familiarity with JavaScript and web development is recommended.
The official outline divides the JS-Dev-101 exam into weighted domains, including:
- Salesforce Platform Integration ()
- Browser and DOM Interaction ()
- Object-Oriented JavaScript ()
The Salesforce Certified JavaScript Developer - Multiple Choice bank at ITCertMagic is created by IT experts and certified trainers around these same objectives, and updated daily against them.
Classes have fixed schedules, commutes, and course fees; self-paced preparation has none of those. With the Salesforce Certified JavaScript Developer - Multiple Choice materials, you practice the JS-Dev-101 exam questions in your spare time, on any device, reviewing only what your results say needs review — a structure that saves both time and money. The content is created by IT experts and certified trainers, so flexibility costs you nothing in quality.
Salesforce recommends these training resources for candidates:
Official training and self-paced practice answer different needs — many candidates use official resources for depth and our bank for daily exam readiness.
Passing the JS-Dev-101 exam requires 65%, and registration costs $200 USD. Smart preparation is simply the strategy of protecting that fee with practice that mirrors the real thing.
The JS-Dev-101 exam contains 60 (multiple choice) questions with 105 minutes minutes to complete them. The online test engine recreates that atmosphere on any device, so the real exam feels like a repeat performance.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Refer to the code below:
01 let total = 10;
02 const interval = setInterval(() => {
03 total++;
04 clearInterval(interval);
05 total++;
06 }, 0);
07 total++;
08 console.log(total);
Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?
- A. 10
- B. 11
- C. 13
- D. 12
Correct Answer: B 🗳️
Explanation: Only visible for ITCertMagic members. You can sign-up / login (it's free).
01 function Animal(size, type) {
02 this.type = type || 'Animal';
03 this.canTalk = false;
04 }
05
06 Animal.prototype.speak = function() {
07 if (this.canTalk) {
08 console.log("It spoke!");
09 }
10 };
11
12 let Pet = function(size, type, name, owner) {
13 Animal.call(this, size, type);
14 this.size = size;
15 this.name = name;
16 this.owner = owner;
17 }
18
19 Pet.prototype = Object.create(Animal.prototype);
20 let pet1 = new Pet();
Given the code above, which three properties are set for pet1?
- A. speak
- B. owner
- C. type
- D. canTalk
- E. name
Correct Answer: C,D,E 🗳️
Explanation: Only visible for ITCertMagic members. You can sign-up / login (it's free).
Refer to the code below:
01 let first = 'Who';
02 let second = 'What';
03 try {
04 try {
05 throw new Error('Sad trombone');
06 } catch (err) {
07 first = 'Why';
08 throw err;
09 } finally {
10 second = 'When';
11 }
12 } catch (err) {
13 second = 'Where';
14 }
What are the values for first and second once the code executes?
- A. first is Who and second is Where.
- B. first is Why and second is When.
- C. first is Why and second is Where.
- D. first is Who and second is When.
Correct Answer: C 🗳️
Explanation: Only visible for ITCertMagic members. You can sign-up / login (it's free).
Refer to the code below:
let productSKU = '8675309';
A developer has a requirement to generate SKU numbers that are always 19 characters long, starting with 'sku', and padded with zeros.
Which statement assigns the value sku000000008675309?
- A. productSKU = productSKU.padEnd(16, '0').padStart(19, 'sku');
- B. productSKU = productSKU.padStart(19, '0').padStart('sku');
- C. productSKU = productSKU.padEnd(16, '0').padStart('sku');
- D. productSKU = productSKU.padStart(16, '0').padStart(19, 'sku');
Correct Answer: D 🗳️
Explanation: Only visible for ITCertMagic members. You can sign-up / login (it's free).
Refer to the following code block:
01 let array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
02 let output = 0;
03
04 for (let num of array) {
05 if (output > 10) {
06 break;
07 }
08 if (num % 2 == 0) {
09 continue;
10 }
11 output += num;
12 }
What is the value of output after the code executes?
- A. 11
- B. 25
- C. 16
- D. 36
Correct Answer: C 🗳️
Explanation: Only visible for ITCertMagic members. You can sign-up / login (it's free).
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