Free Salesforce Javascript-Developer-I Exam Questions

Become Salesforce Certified with updated Javascript-Developer-I exam questions and correct answers

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Total 217 Questions | Updated On: Jul 30, 2025

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Question 1

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 2

Refer to the following code:

class Vehicle{

constructor(plate){

this.plate = plate;

}

class Truck extends Vehicle{

constructor(plate, weight){

//Missing code

this.weight = weight;

}

displayWeight(){

console.log(`The truck ${this.plate} has a weight of ${this.weight}lb.`);

}

}let myTruck = new Truck('123Ab',5000);

myTruck.displayWeight();

Which statement should be added to missing code for the code to display 'The truck 123AB has a

weight of 5000lb.

A : super(plate)

B : super.plate = plate

C : Vehicle.plate = plate

D : this.plate = plate

Answer: A

Question 3

Considering type coercion, what does the following expression evaluate to?

True + '13' + NaN

A : ' 113Nan '

B : 14

C : ' true13 '

D : ' true13NaN '

Answer: D

Question 4

Refer to HTML below:

The current status of an Order: <span id =''status''> In Progress </span>

Which JavaScript statement changes the text 'In Progress' to 'Completed' ?

A : document.getElementById(''status'').Value = 'Completed' ;

B : document.getElementById(''#status'')[removed] = 'Completed' ;

C : document.getElementById(''status'')[removed] = 'Completed' ;

D : document.getElementById(''.status'')[removed] = 'Completed' ;

Answer: C

Question 5

Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

A : 'London'

B : undefined

C : An error

D : 'NaN'

Answer: D

Page: 1 / 44

Total 217 Questions | Updated On: Jul 30, 2025

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