Free Javascript-Developer-I Mock Exam – Practice Online Confidently

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Exam Code: Javascript-Developer-I
Exam Questions: 217
Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101)
Updated: 06 Jan, 2026
Question 1

Refer to the expression below:Let x = ('1' + 2) == (6 * 2);How should this expression be modified to ensure that evaluates to false?

Options :
Answer: B

Question 2

A developer creates a simple webpage with an input field. When a user enters text inthe input field and clicks the button, the actual value of the field must be displayed in theconsole.Here is the HTML file content:< input type ='' text'' value=''Hello'' name =''input'' >< button type =''button'' >Display < /button >The developer wrote the javascript code below:Const button = document.querySelector('button');button.addEvenListener('click', () => (Const input = document.querySelector('input');console.log(input.getAttribute('value'));When the user clicks the button, the output is always ''Hello''.What needs to be done make this code work as expected?

Options :
Answer: A

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.

Capture

Which two results occur when running this test on the updated sum3 function?
Choose 2 answers

Options :
Answer: B,D

Question 4

A developer creates a class that represents a blog post based on the requirement that aPost should have a body author and view count.The Code shown Below:Class Post {// Insert code hereThis.body =bodyThis.author = author;this.viewCount = viewCount;}}Which statement should be inserted in the placeholder on line 02 to allow for a variable to be setto a new instanceof a Post with the three attributes correctly populated?

Options :
Answer: C

Question 5

A developer is working on an ecommerce website where the delivery date is dynamically
calculated 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's
date + 9 days.
Which code meets this new requirement?

Options :
Answer: A

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