Students hear it from every side, and working professionals feel it daily: the job market rewards proof of skill. The JS-Dev-101 exam provides that proof, and PracticeVCE helps you earn it with 149 practice questions built by a dedicated expert team and updated as the exam evolves.
Salesforce JS-Dev-101 Exam Overview:
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer - Multiple Choice |
| Exam Number: | JS-Dev-101 |
| Exam Format: | Multiple select, Multiple choice |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Developer |
| Exam Duration: | 105 minutes |
| Exam Price: | USD 200 |
| Available Languages: | Japanese, English |
| 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 |
|---|---|---|
| Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks, promises, async/await |
| Testing | 7% | - Test coverage and improvement - Unit test structure and effectiveness |
| Objects, Functions, and Classes | 25% | - ES6 classes, inheritance, modules, decorators - Object creation, properties, prototypes - Function types, scope, closures, arrow functions |
| Server Side JavaScript | 8% | - Package management and CLI tools - Node.js fundamentals and core modules |
| Debugging and Error Handling | 7% | - Error types and handling strategies - Console usage, breakpoints and debugging techniques |
| Browser and Events | 17% | - Browser APIs and developer tools - Event handling, propagation, listeners - DOM selection and manipulation |
| Variables, Types, and Collections | 23% | - JSON parsing and manipulation - Variable declaration and scope - Strings, numbers, dates, arrays and methods - Data types, type coercion, truthy/falsy values |
JS-Dev-101 Exam: Your Questions Answered
Online proctored or onsite at authorized testing centers Register for the Salesforce Certified JavaScript Developer - Multiple Choice exam through these official channels:
With your exam date confirmed, the 149 practice questions from PracticeVCE — delivered by email within 1 minute — turn the waiting weeks into structured preparation.
Per the official outline, the Salesforce Certified JavaScript Developer - Multiple Choice exam spans 7 domains, led by Variables, Types, and Collections (23%), Asynchronous Programming (13%), and Testing (7%). The complete breakdown is in the topics section above; the 149 practice questions at PracticeVCE cover all of it.
Passing the Salesforce Certified JavaScript Developer - Multiple Choice exam requires 65%, and the registration fee is USD 200. Since retakes are not free, a readiness check with the PracticeVCE practice engines is a sensible step before you commit to an exam date.
The JS-Dev-101 exam is a Salesforce certification exam covering the Salesforce Certified JavaScript Developer - Multiple Choice syllabus outlined above. It contributes to these credential paths: Salesforce Certified Developer, Salesforce Certified Platform Developer I. In a competitive market, a Salesforce credential signals verified capability to employers — which is why candidates keep choosing it in 2026. PracticeVCE prepares you with 149 practice questions in PDF, Desktop Test Engine, and Online Test Engine formats.
Then the written refund policy applies. If you take the Salesforce Certified JavaScript Developer - Multiple Choice exam within 60 days of purchase and do not pass, PracticeVCE refunds you in full. The policy excludes exams taken within 3 days of purchase, exams never actually taken, free materials, and expired orders, and the candidate name must match the payer name. Submit a scan of your enrollment slip and the official Score Report PDF within 2 days of the exam; claims are processed within 7 days. Prefer to keep going? Exchange for two free exam products of equal value and retain your original update service. Delivery is by email within 1 minute of purchase — contact support if nothing arrives within 2 hours.
Salesforce recommends these training resources for the Salesforce Certified JavaScript Developer - Multiple Choice exam:
Pair official training with the 149 practice questions from PracticeVCE to convert study time into exam readiness — especially effective when you are fitting preparation into fragmented hours.
Expect 60 scored + up to 5 unscored in 105 minutes on the Salesforce Certified JavaScript Developer - Multiple Choice exam. The PracticeVCE Desktop Test Engine reproduces this environment — real timing, exam-style flow — so the actual test day feels like a rehearsal you have already done.
Everything you need in one purchase: 149 practice questions for the Salesforce Certified JavaScript Developer - Multiple Choice exam across three formats — a printable, expert-prepared PDF with instant download; a Desktop Test Engine for Windows that simulates the real exam environment with two practice modes and works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS, complete with test history and performance review. Also included: a free demo, 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.
No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity Requirements can be revised, so confirm the latest on the official Salesforce exam page before booking.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Which two console logs output NaN?
- A. console.log(10 / 'five');
- B. console.log(parseInt('two'));
- C. console.log(10 / Number('5'));
- D. console.log(10 / 0);
Correct Answer: A,B 🗳️
Explanation: Only visible for PracticeVCE members. You can sign-up / login (it's free).
A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.
The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server.js file will start the server. The developer wants to debug the Node.js server only using the terminal.
Which command can the developer use to open the CLI debugger in their current terminal window?
(With corrected typing errors: node_inspect → node inspect, node_start_inspect → node start inspect.)
- A. node inspect server.js
- B. node -i server.js
- C. node start inspect server.js
- D. node server.js --inspect
Correct Answer: A 🗳️
Explanation: Only visible for PracticeVCE 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. 36
- C. 25
- D. 16
Correct Answer: D 🗳️
Explanation: Only visible for PracticeVCE members. You can sign-up / login (it's free).
Given the code:
01 function GameConsole(name) {
02 this.name = name;
03 }
04
05 GameConsole.prototype.load = function(gamename) {
06 console.log('${this.name} is loading a game: ${gamename}....');
07 }
08
09 function Console16bit(name) {
10 GameConsole.call(this, name);
11 }
12
13 Console16bit.prototype = Object.create(GameConsole.prototype);
14
15 // insert code here
16 console.log('${this.name} is loading a cartridge game: ${gamename}....');
17 }
18
19 const console16bit = new Console16bit('SNEGeneziz');
20 console16bit.load('Super Monic 3x Force');
What should a developer insert at line 15?
- A. Console16bit.prototype.load = function(gamename) {
- B. Console16bit = Object.create(GameConsole.prototype).load = function(gamename) {
- C. Console16bit.prototype.load(gamename) = function() {
- D. Console16bit.prototype.load(gamename) {
Correct Answer: A 🗳️
Explanation: Only visible for PracticeVCE members. You can sign-up / login (it's free).
Given two expressions var1 and var2, what are two valid ways to return the concatenation of the two expressions and ensure it is data type string?
- A. var1.toString() + var2.toString()
- B. String(var1).concat(var2)
- C. var1 + var2
- D. String.concat(var1 + var2)
Correct Answer: A,B 🗳️
Explanation: Only visible for PracticeVCE members. You can sign-up / login (it's free).
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