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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Topic 1: Browser and DOM Interaction	- Event handling and propagation - DOM manipulation and traversal - Browser APIs (fetch, storage, timers)
Topic 2: JavaScript Language Fundamentals	- Data types, variables, and operators - Functions, scope, and closures - ES6+ syntax and features
Topic 3: Testing and Debugging	- Debugging techniques and tools - Unit testing principles
Topic 4: Salesforce Platform Integration	- Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript
Topic 5: Asynchronous JavaScript	- Error handling in async workflows - Promises and async/await - Event loop and concurrency model

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q82-Q87):

NEW QUESTION # 82
Universal containers (UC) just launched a new landing page, but users complain that the website is slow, A developer found some functions that cause this problem, To verify this, the developer decides to execute everything and log the time each of these suspicious function consumes.

Which function can then developer use to obtain the time spent by every one of the three functions?

A. Console.getTime ( )
B. Console.timeLog ( )
C. Console, timestamp
D. Console,trace ( )

Answer: A

NEW QUESTION # 83
Refer to the code:

Given the code above, which three properties are set for pet1? Choose 3 answers

A. name
B. owner
C. type
D. canTalk
E. size

Answer: C,D,E

NEW QUESTION # 84
Refer to the code below:

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

A. undefined
B. An error
C. 'NaN'
D. 'London'

Answer: C

NEW QUESTION # 85
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 http =require('http');
B. const tls = require('tls');
C. const https =require('https');
D. const server =require('secure-server');

Answer: C

NEW QUESTION # 86
Refer to the following code:
Let obj ={
Foo: 1,
Bar: 2
}
Let output =[],
for(let something in obj{
output.push(something);
}
console.log(output);
What is the output line 11?

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

Answer: B

NEW QUESTION # 87
......

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