Free Salesforce JS-Dev-101 Practice Exam Questions and Answers 2026

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Total 217 Questions | Updated On: Apr 02, 2026

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Question 1

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.

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

Choose 2 answers

A : The line 05 assertion passes.

B : The line 02 assertion passes.

C : The line 02 assertion fails.

D : The line 05 assertion fails.

Answer: B,D

Question 2

Given the following code:

document.body.addEventListener(' click ', (event) => {

if (/* CODE REPLACEMENT HERE */) {

console.log('button clicked!');

)

});

Which replacement for the conditional statement on line 02 allows a developer to

correctly determine that a button on page is clicked?

A : Event.clicked

B : e.nodeTarget ==this

C : event.target.nodeName == 'BUTTON'

D : button.addEventListener('click')

Answer: C

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

Given two expressions var1 and var2. What are two valid ways to return the logical AND

of the two expressions and ensure it is data type Boolean ?

Choose 2 answers:

A : Boolean(var1 && var2)

B : var1 && var2

C : var1.toBoolean() && var2toBoolean()

D : Boolean(var1) && Boolean(var2)

Answer: A,D

Question 5

Refer to the code below:

Const pi = 3.1415326,

What is the data type of pi?

A : Double

B : Number

C : Decimal

D : Float

Answer: B

Page: 1 / 44

Total 217 Questions | Updated On: Apr 02, 2026

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