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Salesforce JavaScript-Developer-I Certification Exam covers a wide range of topics related to JavaScript development in Salesforce. These topics include but are not limited to: Apex, Visualforce, Lightning Components, Aura Components, JavaScript, and HTML/CSS. JavaScript-Developer-I exam also assesses the candidate's ability to design and implement solutions using best practices and Salesforce development standards.

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q222-Q227):

NEW QUESTION # 222
The developer wants to test the array shown:
const arr = Array(5).fill(0)
Which two tests are the most accurate for this array ?
Choose 2 answers:

A. console.assert (arr.length >0);
B. console.assert( arr.length === 5 );
C. console.assert(arr[0] === 0 && arr[ arr.length] === 0);
D. arr.forEach(elem => console.assert(elem === 0)) ;

Answer: B,D

NEW QUESTION # 223
Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about
recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this?
Choose 2 answers

A. 'Update' , '123abc'
B. 'Update' , {
Details : {
recordId : '123abc'
C. { type : 'update', recordId : '123abc' }
D. 'Update' , (
recordId : '123abc'
(

Answer: B,D

Explanation:
}
}

NEW QUESTION # 224
Refer to the following code:

What is the output of line 11?

A. ["foo", "bar"]
B. ["foo:1", "bar:2"]
C. [1,2]
D. ["bar", "foo"]

Answer: A

NEW QUESTION # 225
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?

A. [1, 2, 3, 4, 4, 5, 4]
B. [1, 2, 3, 4, 5, 4, 4]
C. [1, 2, 3, 4, 5, 4]
D. [1, 2, 3, 5]

Answer: A

NEW QUESTION # 226
A developer wants to set up a secure web server with Node.js. The developer creates a directory locally called app-server, and the first file is app-server/index.js Without using any third-party libraries, what should the developer add to index.js to create the secure web server?

A. const https =require('https');
B. const http =require('http');
C. const tls = require('tls');
D. const server =require('secure-server');

Answer: A

NEW QUESTION # 227
......

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