Higher Test Marks with Free Online JS-Dev-101 Exam Practice

Assess the CertsIQ’s updated JS-Dev-101 exam questions for free online practice of your Salesforce Certified JavaScript Developer - Multiple Choice test. Our Javascript-Developer-I JS Dev 101 dumps questions will enhance your chances of passing the Salesforce Certified Developer certification exam with higher marks.

Exam Code: JS-Dev-101
Exam Questions: 217
Salesforce Certified JavaScript Developer - Multiple Choice
Updated: 20 Aug, 2025
Question 1

Refer to the following array:Let arr1 = [ 1, 2, 3, 4, 5 ];CaptureWhich two lines of code result in a second array, arr2 being created such that arr2 is nota reference to arr1?

Options :
Answer: A,B

Question 2

Refer to the code below:new Promise((resolve, reject) => {const fraction = Math.random();if( fraction >0.5) reject('fraction > 0.5, ' + fraction);resolve(fraction);}).then(() =>console.log('resolved')).catch((error) => console.error(error)).finally(() => console.log(' when am I called?'));CaptureWhen does Promise.finally on line 08 get called?

Options :
Answer: D

Question 3

Given the code below:01 function GameConsole (name) {02 this.name = name;03 }0405 GameConsole.prototype.load = function(gamename) {06 console.log( ` $(this.name) is loading a game : $(gamename) ...`);07 )08 function Console 16 Bit (name) {09 GameConsole.call(this, name) ;10 }11 Console16bit.prototype = Object.create ( GameConsole.prototype) ;12 //insert code here13 console.log( ` $(this.name) is loading a cartridge game : $(gamename) ...`);14 }15 const console16bit = new Console16bit(' SNEGeneziz ');16 console16bit.load(' Super Nonic 3x Force ');What should a developer insert at line 15 to output the following message using themethod ?> SNEGeneziz is loading a cartridge game: Super Monic 3x Force . . .

Options :
Answer: B

Question 4

A developer wants to use a try...catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.What is the correct implementation of the try...catch?

Options :
Answer: A

Question 5

A developer is working on an ecommerce website where the delivery date is dynamicallycalculated based on the current day. The code line below is responsible for this calculation.Const deliveryDate = new Date ();Due to changes in the business requirements, the delivery date must now be today'sdate + 9 days.Which code meets this new requirement?

Options :
Answer: A

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