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: 14 Jul, 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

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

Options :
Answer: D

Question 4

Considering type coercion, what does the following expression evaluate to?
True + '13' + NaN

Options :
Answer: D

Question 5

What is the result of the code block?

Options :
Answer: D

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