Free Salesforce JS-Dev-101 Exam Practice Questions
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PDF Questions
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Online Engine
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Question No 1
A team at Universal Containers works on a big project and uses yarn to manage the project's dependencies. A developer added a dependency to manipulate dates and pushed the updates to the remote repository. The rest of the team complains that the dependency does not get downloaded when they execute yarn. What could be the reason for this?
Question No 2
Refer to the code below 01 let o = { 02 get js() { 03 let city1 = String('St. Louis'); 04 let city2 = String('New York'); 05 06 return { 07 firstCity city1.toLowerCase(), 08 secondCity city2.toLowerCase(), 09 } 10 } 11 } What value can a developer expect when referencing o.js.secondCity?
Question No 3
Refer to the code below 01 x = 3.14; 02 03 function myFunction() { 04 'use strict'; 05 y = x; 06 } 07 08 z = x; 09 myFunction(); Considering the implications of 'use strict' on line 04, which three statements describe the execution of the code?
Question No 4
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?
Question No 5
Refer to the code below 01 const objBook = { 02 title 'JavaScript', 03 }; 04 Object.preventExtensions(objBook); 05 const newObjBook = objBook; 06 newObjBook.author = 'Robert'; What are the values of objBook and newObjBook respectively?
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Total 147 Questions
About This JS-Dev-101 Question Bank
This page has 147 free practice questions for the Salesforce JS-Dev-101 (Salesforce Certified JavaScript Developer) exam, last refreshed on 8th Sep 2026. Answer each question, then reveal the correct choice to check your understanding before deciding whether to unlock the full question bank.
The demo above is a sample of the complete JS-Dev-101 question set. The full bank includes the PDF, downloadable practice test, and online exam-engine formats listed above, with free updates included for the duration you choose.
Frequently Asked Questions
How many free JS-Dev-101 questions can I try here?
This demo includes a sample from our 147-question JS-Dev-101 bank so you can check the format and difficulty before purchasing.
Are these JS-Dev-101 questions updated?
Yes, the Salesforce JS-Dev-101 question bank is reviewed and refreshed periodically to reflect current exam objectives.
What formats are available for the full JS-Dev-101 question bank?
PDF download, an online practice-test engine, and a combined bundle pack with 3, 6, or 12-month free updates.
Is there a refund if I don't pass?
Yes, purchases include a money-back guarantee — see our refund policy for details.