Free Online Salesforce Javascript-Developer-I Practice Test

Prepare Your Salesforce Javascript-Developer-I Exam Questions with Free online Javascript-Developer-I Practice Test. Get Brilliant Salesforce Certified JavaScript Developer I (WI24) Exam Results with Valid Javascript Developer I Exam Dumps.

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Total 217 Questions | Updated On: May 13, 2024

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Question 1

A developer creates a simple webpage with an input field. When a user enters text in

the input field and clicks the button, the actual value of the field must be displayed in the

console.

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?

A : Replace line 04 with console.log(input .value);

B : Replace line 03 with const input = document.getElementByName('input');

C : Replace line 02 with button.addEventListener(''onclick'', function() {

D : Replace line 02 with button.addCallback(''click'', function() {

Answer: A

Question 2

A developer is working on an ecommerce website where the delivery date is dynamically

calculated based on the current day. The code line below is responsible for this calculation.

Const deliveryDate = new Date ();

Due to changes in the business requirements, the delivery date must now be today's

date + 9 days.

Which code meets this new requirement?

A : deliveryDate.setDate(( new Date ( )).getDate () +9);

B : deliveryDate.setDate( Date.current () + 9);

C : deliveryDate.date = new Date(+9) ;

D : deliveryDate.date = Date.current () + 9;

Answer: A

Question 3

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 4

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 5

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

Page: 1 / 44

Total 217 Questions | Updated On: May 13, 2024

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