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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Browser and DOM Interaction	- Event handling and propagation - DOM manipulation and traversal - Browser APIs (fetch, storage, timers)
Salesforce Platform Integration	- Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript
Asynchronous JavaScript	- Event loop and concurrency model - Error handling in async workflows - Promises and async/await
JavaScript Language Fundamentals	- Functions, scope, and closures - Data types, variables, and operators - ES6+ syntax and features
Testing and Debugging	- Debugging techniques and tools - Unit testing principles

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q24-Q29):

NEW QUESTION # 24
Refer to the code below:
Let textValue = '1984';
Which code assignment shows a correct way to convert this string to an integer?

A. Let numberValue = Integer(textValue);
B. Let numberValue = textValue.toInteger();
C. let numberValue = Number(textValue);
D. Let numberValue = (Number)textValue;

Answer: C

NEW QUESTION # 25
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 server = require( ' secure-server ' );
C. const tls = require( ' tls ' );
D. const http = require( ' http ' );

Answer: A

Explanation:
* Node.js provides two built-in modules for creating servers:
* http # creates non-secure HTTP servers
* https # creates secure HTTPS servers
* A secure server requires:
* SSL/TLS certificates (key and cert)
* The built-in Node.js module designed to handle these: https
* Syntax for a secure server:
const https = require( ' https ' );
const fs = require( ' fs ' );
const options = {
key: fs.readFileSync( ' key.pem ' ),
cert: fs.readFileSync( ' cert.pem ' )
};
https.createServer(options, (req, res) = > {
res.write( ' Secure Server ' );
res.end();
}).listen(443);
* Evaluation of options:
* A is incorrect: No built-in module named secure-server exists.
* B is incorrect: tls provides low-level TLS sockets, not HTTP/HTTPS servers.
* C is incorrect: http only creates an insecure server.
* D is correct: https is the built-in module required for secure web servers.
JavaScript Knowledge References (text-only)
* Node.js exposes built-in modules http and https for server creation.
* Secure servers require the https module, which supports TLS/SSL.
* The tls module is lower-level and not used for full HTTP servers.

NEW QUESTION # 26
A developer wants to define a function log to be used a few times on a single-file JavaScript script.
01 // Line 1 replacement
02 console.log('"LOG:', logInput);
03 }
Which two options can correctly replace line 01 and declare the function for use?
Choose 2 answers

A. function leg(logInput) {
B. const log = (logInput) => {
C. const log(loginInput) {
D. function log = (logInput) {

Answer: A,B

NEW QUESTION # 27
Refer to the code below:

What is the result of running line 05?

A. Neither aPromise or bPromise runs.
B. Only apromise runs.
C. aPromise and bPromise run sequentially.
D. Apromise and bpromise run in parallel.

Answer: A

NEW QUESTION # 28
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as (3, 4, 5)?
Choose 3 answers

A. Let x = arr.filter( (a) => )return a > 2 )) ;
B. Let x = arr.aplice (2, 3);
C. Let x = arr.filter( (a) => ( a < 2)) ;
D. Let x = arr.alice (2) ;
E. Let x = arr. Slince (2, 3);

Answer: A,B,D

NEW QUESTION # 29
......

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