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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: 21 Mar, 2026
Question 1

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

Options :
Answer: D

Question 2

What is the result of the code block?

Options :
Answer: D

Question 3

Refer to code below:console.log(0);setTimeout(() => (console.log(1);});console.log(2);setTimeout(() => {console.log(3);), 0);console.log(4);In which sequence will the numbers be logged?

Options :
Answer: C

Question 4

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 5

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

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