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| Section | Weight | Objectives |
|---|---|---|
| Browser and Events | 17% | - Event handling, propagation, listeners - Browser APIs and developer tools - DOM selection and manipulation |
| 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 |
| Testing | 7% | - Unit test structure and effectiveness - Test coverage and improvement |
| Variables, Types, and Collections | 23% | - Strings, numbers, dates, arrays and methods - JSON parsing and manipulation - Data types, type coercion, truthy/falsy values - Variable declaration and scope |
| Debugging and Error Handling | 7% | - Console usage, breakpoints and debugging techniques - Error types and handling strategies |
| Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks, promises, async/await |
The JS-Dev-101 exam is Salesforce's official assessment for the Salesforce Certified JavaScript Developer certification, positioned at the Intermediate / Specialist level. It measures whether you can apply the Salesforce Certified JavaScript Developer - Multiple Choice skills in practical, job-like situations — which is why rote memorization alone rarely gets candidates across the line. The credential fits into a wider Salesforce certification path that includes Salesforce Certified Developer, Salesforce Certified Platform Developer I, so passing it opens more than one door. Think of the JS-Dev-101 exam as the point where your preparation becomes a qualification employers can verify.
The Salesforce Certified JavaScript Developer - Multiple Choice syllabus is organized into 7 domains, beginning with Debugging and Error Handling (7%), Testing (7%), and Browser and Events (17%). Those percentages are your study budget: a domain carrying a larger share of the score deserves a matching share of your hours. The full domain-by-domain breakdown is in the exam topics section above — work from that, not from habit.
You'll have 105 minutes to complete 60 scored + up to 5 unscored questions on the Salesforce Certified JavaScript Developer - Multiple Choice exam. Before test day, convert those numbers into a per-question time budget — then defend it. When a single question starts eating double its share, mark it, move on, and return with whatever time remains. Two or three full timed runs in the VerifiedDumps test engine will make that discipline automatic; its built-in timer records every attempt so you can watch your pace improve session by session.
Salesforce sets the passing bar at 65%, and a seat at the JS-Dev-101 exam costs USD 200. There is no reduced fee for a second try — a miss means paying the full amount again — so the cheapest retake is the one you never need. A sensible approach: run timed self-assessments with VerifiedDumps practice tests until your scores sit comfortably above the passing mark with margin to spare, then book your exam date. That cushion absorbs nerves and the inevitable oddball question.
Salesforce lists the Salesforce Certified JavaScript Developer - Multiple Choice question formats as: Multiple choice, Multiple select. Each format has its own trap. With scenario items, the actual question hides at the end of a long stem — read the last sentence first, then work back through the details. With elimination-friendly formats, cross out what you can disprove before committing. The VerifiedDumps question bank lets you rehearse every format until the mechanics feel boring, which is exactly where you want to be on exam day.
You can sit the Salesforce Certified JavaScript Developer - Multiple Choice exam in English, Japanese. Go with whichever language you process fastest under pressure — comprehension speed quietly decides close exams. If English is your choice, working through VerifiedDumps's 149 English-language practice questions doubles as terminology drills, so the exam's phrasing reads like a familiar accent instead of a foreign one.
Once you pass the Salesforce Certified JavaScript Developer - Multiple Choice exam, your credential stays valid for Does not expire; requires maintenance updates. Don't let that date ambush you — mark it on a calendar now, and look into the recertification path well before expiry so renewal is a planned errand rather than an emergency. Recertification rules belong to Salesforce and do change, so verify the current policy on the official certification page.
All three versions contain the same 149 expert-written practice questions — you're choosing a study style, not a syllabus:
Short on time? The test engines' automatic performance reports show you which topics still bleed points, so your remaining hours land where they matter.
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Your next step is free: download the JS-Dev-101 demo, see how the 149 practice questions read, and decide with evidence instead of promises.
Refer to the code below:
let inArray = [ [1, 2], [3, 4, 5] ];
Which two statements result in the array [1, 2, 3, 4, 5]?
(With corrected typing errors: usArray → inArray, .. → ....)
Correct Answer: C,D 🗳️
Explanation: Only visible for VerifiedDumps 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?
Correct Answer: A 🗳️
Explanation: Only visible for VerifiedDumps members. You can sign-up / login (it's free).
A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed to do some custom initialization when the webpage is fully loaded with HTML content and all related files.
Which statement should be used to call personalizeWebsiteContent based on the above business requirement?
Correct Answer: C 🗳️
Explanation: Only visible for VerifiedDumps 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?
Correct Answer: A,D 🗳️
Explanation: Only visible for VerifiedDumps members. You can sign-up / login (it's free).
A developer implements a function that adds a few values.
function sum(num1, num2, num3) {
if (num3 === undefined) {
num3 = 0;
}
return num1 + num2 + num3;
}
Which three options can the developer invoke for this function to get a return value of 10?
Correct Answer: A,B,D 🗳️
Explanation: Only visible for VerifiedDumps members. You can sign-up / login (it's free).
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