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 12, 2026
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- Total Questions: 149
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- Total Questions: 149
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Candidates in different countries around the world prepare with Lead2PassExam materials, and the JS-Dev-101 exam package is one of the most traveled. Wherever you study in 2026, the Salesforce Certified JavaScript Developer - Multiple Choice question bank arrives by email and works the same way.
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Variables, Types, and Collections | 23% | - Variable declaration (var, let, const, scoping, hoisting) - JSON parsing and stringification - String manipulation and Date objects - Array manipulation (map, filter, reduce, forEach, find) - Type coercion and type conversion |
| Topic 2: Testing | 7% | - Unit testing with Jest - Automated testing strategies - Test-driven development principles |
| Topic 3: Objects, Functions, and Classes | 25% | - Object creation, properties, and prototypal inheritance - JavaScript modules (export, import) - Higher-order functions and closures - ES6 Classes, constructors, methods, and inheritance - Function declarations, expressions, and arrow functions |
| Topic 4: Asynchronous Programming | 13% | - Event loop and asynchronous code execution - Callback patterns - Promises and async/await |
| Topic 5: Debugging and Error Handling | 7% | - Logging strategies and debugging techniques - try-catch blocks |
| Topic 6: Server Side JavaScript | 8% | - Modules and file operations - Salesforce API integration - Node.js applications |
| Topic 7: Browser and Events | 17% | - Browser Developer Tools - Event handling, propagation, bubbling, and capturing - DOM manipulation |
The Salesforce Certified JavaScript Developer - Multiple Choice Exam: Clear Answers
Patient, courteous, and available around the clock. Our team handles Salesforce Certified JavaScript Developer - Multiple Choice questions 24/7 with genuine respect for your time — whether you need help downloading, installing, or understanding an update. We treat our reputation as something earned one customer at a time, which is why so many candidates who finish the JS-Dev-101 exam with us come back when their next certification appears on the horizon.
Completion of the Lightning Web Components Specialist Superbadge is required to earn the full credential, though it can be completed before or after the exam.
A dedicated team of experts compiles the Salesforce Certified JavaScript Developer - Multiple Choice question bank and maintains it continuously: new questions are added as the exam evolves in the market, and the content is recomposed against the latest syllabus and trends. Difficult topics are distilled into clear, study-friendly form, and every answer is expert-verified. The JS-Dev-101 exam bank you buy is a living product, not a frozen file.
The JS-Dev-101 exam is the official assessment behind the Salesforce Certified JavaScript Developer - Multiple Choice certification from Salesforce. Credentials like this carry weight because they demonstrate something specific: the ability to solve problems under pressure, verified by an independent exam. In a competitive field, that visible proof of skill is what helps a candidate stand out — and thorough preparation is what earns it.
Passing the JS-Dev-101 exam requires 65%, and registration costs $200 USD. Success takes perspiration — and a smart way to spend it, which is exactly what objective-aligned practice with verified answers provides.
The official outline divides the JS-Dev-101 exam into weighted domains, including:
- Browser and Events (17%)
- Asynchronous Programming (13%)
- Objects, Functions, and Classes (25%)
The Salesforce Certified JavaScript Developer - Multiple Choice bank at Lead2PassExam is recomposed against this syllabus whenever it shifts, so the material tracks the exam's own direction.
The JS-Dev-101 exam contains 60 (plus up to 5 unscored pilot questions) questions with 105 minutes minutes to complete them. Solving problems under time pressure is a skill of its own — and timed practice is how you build it.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Refer to the following code block (with corrected template literals using backticks):
01 class Animal {
02 constructor(name) {
03 this.name = name;
04 }
05
06 makeSound() {
07 console.log(`${this.name} is making a sound.`);
08 }
09 }
10
11 class Dog extends Animal {
12 constructor(name) {
13 super(name);
14 this.name = name;
15 }
16 makeSound() {
17 console.log(`${this.name} is barking.`);
18 }
19 }
20
21 let myDog = new Dog('Puppy');
22 myDog.makeSound();
What is the console output?
- A. > Uncaught ReferenceError
- B. > Undefined
- C. > Puppy is barking.
Correct Answer: C 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Value of:
true + 3 + '100' + null
- A. 104
- B. "4100"
- C. "4100null"
- D. "2200null"
Correct Answer: C 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Refer to the code below:
const pi = 3.1415926;
What is the data type of pi?
- A. Float
- B. Decimal
- C. Number
- D. Double
Correct Answer: C 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Refer to the code:
01 console.log('Start');
02 Promise.resolve('Success').then(function(value) {
03 console.log('Success');
04 });
05 console.log('End');
What is the output after the code executes successfully?
- A. Start
End
Success - B. Success
Start
End - C. Start
Success
End - D. End
Start
Success
Correct Answer: A 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Corrected code:
let obj = {
foo: 1,
bar: 2
};
let output = [];
for (let something in obj) {
output.push(something);
}
console.log(output);
What is the output of line 11?
- A. ["bar", "foo"]
- B. [1, 2]
- C. ["foo", "bar"]
- D. ["foo:1", "bar:2"]
Correct Answer: C 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
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