Free Salesforce JS-Dev-101 Exam Questions

Become Salesforce Certified with updated JS-Dev-101 exam questions and correct answers

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Total 217 Questions | Updated On: Sep 24, 2026
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Question 1

Refer to the following array:Let arr = [1, 2, 3, 4, 5];Which three options result in x evaluating as [1, 2]?Choose 3 answer


Answer: A,B,C
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?


Answer: D
Question 3

A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array, and the test passes.A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.CaptureWhich two results occur when running this test on the updated sum3 function?Choose 2 answers


Answer: B,D
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?


Answer: A
Question 5

Refer to HTML below:The current status of an Order: In Progress Which JavaScript statement changes the text 'In Progress' to 'Completed' ?


Answer: C
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Total 217 Questions | Updated On: Sep 24, 2026
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