Free JS-Dev-101 Mock Exam – Practice Online Confidently

Increase your chances of passing the Salesforce JS-Dev-101 exam questions on your first try. Practice with our free online JS-Dev-101 exam mock test designed to help you prepare effectively and confidently.

Exam Code: JS-Dev-101
Exam Questions: 217
Salesforce Certified JavaScript Developer - Multiple Choice
Updated: 01 Jul, 2026
Question 1

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

Question 2

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

Options :
Answer: B,D

Question 3

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

Options :
Answer: A,B,C

Question 4

A developer at Universal Containers creates a new landing page based on HTML, CSS, andJavaScript TO ensure that visitors have a good experience, a script named personaliseContextneeds to be executed when the webpage is fully loaded (HTML content and all related files ), inorder to do some custom initialization.Which statement should be used to call personalizeWebsiteContent based on the abovebusiness requirement?

Options :
Answer: B

Question 5

Refer to the code below:8Which value can a developer expect when referencing country,capital,cityString?

Options :
Answer: D

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