100% Free Javascript-Developer-I Practice Exam Questions (2026)

Stay Ahead with Updated Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) Javascript-Developer-I Practice Tests & Verified Answers

Salesforce Javascript-Developer-I Dumps & Practice Test Questions 2026

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Total 217 Questions | Updated On: Aug 02, 2026

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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?

A : Let x = ('1' + ' 2') == ( 6 * 2);

B : Let x = ('1' + 2) == ( 6 * 2);

C : Let x = (1 + 2) == ( '6' / 2);

D : Let x = (1 + 2 ) == ( 6 / 2);

Answer: B

Question 2

Which javascript methods can be used to serialize an object into a string and deserialize

a JSON string into an object, respectively?

A : JSON.stringify and JSON.parse

B : JSON.serialize and JSON.deserialize

C : JSON.encode and JSON.decode

D : JSON.parse and JSON.deserialize

Answer: A

Question 3

developer is trying to convince management that their team will benefit from using

Node.js for a backend server that they are going to create. The server will be a web server that

handles API requests from a website that the team has already built using HTML, CSS, and

JavaScript.

Which three benefits of Node.js can the developer use to persuade their manager?

Choose 3 answers:

A : I nstalls with its own package manager to install and manage third-party libraries.

B : Ensures stability with one major release every few years.

C : Performs a static analysis on code before execution to look for runtime errors.

D : Executes server-side JavaScript code to avoid learning a new language.

E : User non blocking functionality for performant request handling .

Answer: A,C

Question 4

Which three actions can be using the JavaScript browser console?

Choose 3 answers:

A : View and change DOM the page.

B : Display a report showing the performance of a page.

C : Run code that is not related to page.

D : view , change, and debug the JavaScript code of the page.

E : View and change security cookies.

Answer: A,C,D

Question 5

A developer is leading the creation of a new browser application that will serve a single

page application. The team wants to use a new web framework Minimalsit.js. The Lead

developer wants to advocate for a more seasoned web framework that already has a

community around it.

Which two frameworks should the lead developer advocate for?

Choose 2 answers

A : Vue

B : Angular

C : Koa

D : Express

Answer: B,D

Page: 1 / 44

Total 217 Questions | Updated On: Aug 02, 2026

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