Exam Name: Salesforce Certified JavaScript Developer - Multiple Choice
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developers
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- Total Questions: 149
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- Total Questions: 149
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From a free demo to downloadable practice files, browser-based testing, and checkout supported by McAfee security services, Lead2PassExam brings the key JS-Dev-101 preparation tools together in one place. Candidates for Salesforce Certified JavaScript Developer - Multiple Choice can use the 149 practice questions to plan, test, and revisit their knowledge in 2026.
Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing | 7% | - Automated testing strategies - Unit testing with Jest - Test-driven development principles |
| Topic 2: Objects, Functions, and Classes | 25% | - Higher-order functions and closures - Object creation, properties, and prototypal inheritance - ES6 Classes, constructors, methods, and inheritance - JavaScript modules (export, import) - Function declarations, expressions, and arrow functions |
| Topic 3: Variables, Types, and Collections | 23% | - Variable declaration (var, let, const, scoping, hoisting) - String manipulation and Date objects - JSON parsing and stringification - Type coercion and type conversion - Array manipulation (map, filter, reduce, forEach, find) |
| Topic 4: Debugging and Error Handling | 7% | - try-catch blocks - Logging strategies and debugging techniques |
| Topic 5: Browser and Events | 17% | - Browser Developer Tools - Event handling, propagation, bubbling, and capturing - DOM manipulation |
| Topic 6: Asynchronous Programming | 13% | - Promises and async/await - Event loop and asynchronous code execution - Callback patterns |
| Topic 7: Server Side JavaScript | 8% | - Node.js applications - Salesforce API integration - Modules and file operations |
Frequently Asked Questions for the Salesforce JS-Dev-101 Exam
The JS-Dev-101 exam, Salesforce Certified JavaScript Developer - Multiple Choice, assesses whether a candidate can apply Salesforce knowledge to the skills measured by this credential. It is associated with the Salesforce Developers certification. The certification is positioned at the Elementary level. Related credentials include Salesforce Certified JavaScript Developer I, Lightning Web Components Specialist Superbadge.
The JS-Dev-101 exam includes 60 (plus up to 5 unscored pilot questions) questions and allows 105 minutes. Plan your pacing before exam day rather than calculating it under pressure. Timed sessions with Lead2PassExam practice tests can help you decide when to flag a difficult item, keep moving, and reserve enough time for a final review.
The published passing score for Salesforce Certified JavaScript Developer - Multiple Choice is 65%, and the official exam fee is $200 USD. A retake requires budgeting for the full official fee again, so it is sensible to complete several timed practice tests before scheduling. Consistent results across the 149 practice questions can give you a clearer picture of your readiness.
The stated prerequisite information for Salesforce Certified JavaScript Developer - Multiple Choice is: 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. Before registering, review the eligibility details on the official exam page to confirm the requirements.
Yes. Lead2PassExam provides a free PDF demo so you can review the format and quality of the Salesforce Certified JavaScript Developer - Multiple Choice practice questions before placing an order. Your purchase includes 365 days of free updates, and you can extend the update service after expiration at a 50% discount.
If you take the corresponding JS-Dev-101 exam within 60 days of purchase and do not pass, you may apply for a full refund under the 100% Money Back Guarantee. Claims based on an exam taken within 3 days of purchase are not eligible; free materials, expired orders, and downloaded products that were not used before sitting for the exam are also excluded. The candidate name must match the payer name.
To apply, submit a scanned enrollment slip and the official Score Report PDF within 2 days after the exam. Eligible requests are processed within 7 days. If you prefer an alternative, you may receive two free products of equal value and keep the update service for your original purchase.
Delivery is instant after payment. Your download is also sent to your email within one minute; if it has not arrived within 2 hours, contact customer service. There is no limit on the number of computers on which the material can be installed.
The published Salesforce Certified JavaScript Developer - Multiple Choice outline contains 7 major domains. The opening domains include:
- Objects, Functions, and Classes (25%)
- Browser and Events (17%)
- Variables, Types, and Collections (23%)
Review the complete Exam Topics section above for every domain and subtopic before planning your study time.
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
Given the code below:
let numValue = 1982;
Which three code segments result in a correct conversion from number to string?
- A. let strValue = numValue.toString();
- B. let strValue = '' + numValue;
- C. let strValue = (String)numValue;
- D. let strValue = numValue.toText();
- E. let strValue = String(numValue);
Correct Answer: A,B,E 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Corrected code:
let a = "*";
let b = "**";
// x = 3;
console.log(a);
What is displayed when the code executes?
- A. null
- B. *
- C. ReferenceError: a is not defined
- D. undefined
Correct Answer: B 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
01 function Monster() { this.name = 'hello'; };
02 const m = Monster();
What happens due to the missing new keyword?
- A. The m variable is assigned the correct object but this.name remains undefined.
- B. The m variable is assigned the correct object.
- C. window.m is assigned the correct object.
- D. window.name is assigned to 'hello' and the variable m remains undefined.
Correct Answer: D 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
Given a value, which three options can a developer use to detect if the value is NaN?
- A. value === Number.NaN
- B. Object.is(value, NaN)
- C. value !== value
- D. Number.isNaN(value)
- E. value == NaN
Correct Answer: B,C,D 🗳️
A page loads 50+ <div class="ad-library-item"> elements, all ads.
Developer wants to quickly and temporarily remove them.
Options:
- A. Use the browser console to execute a script that removes all elements containing the class ad-library-item.
- B. Use the DOM inspector to prevent the load event from firing.
- C. Use the DOM inspector to remove all elements containing the class ad-library-item.
- D. Use the browser console to execute a script that prevents the load event from firing.
Correct Answer: A 🗳️
Explanation: Only visible for Lead2PassExam members. You can sign-up / login (it's free).
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