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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q96-Q101):

NEW QUESTION # 96
Refer to the code below:
new Promise((resolve, reject) => {
const fraction = Math.random();
if( fraction >0.5) reject("fraction > 0.5, " + fraction);
resolve(fraction);
})
.then(() =>console.log("resolved"))
.catch((error) => console.error(error))
.finally(() => console.log(" when am I called?"));

When does Promise.finally on line 08 get called?

A. WHen resolved
B. When resolved or rejected
C. When rejected
D. When resolved and settled

Answer: B

NEW QUESTION # 97
A developer creates a class that represents a blog post based on the requirement that a
Post should have a body author and view count.
The Code shown Below:
Class Post {
// Insert code here
This.body =body
This.author = author;
this.viewCount = viewCount;
}
}
Which statement should be inserted in the placeholder on line 02 to allow for a variable to be set
to a new instanceof a Post with the three attributes correctly populated?

A. constructor (body, author, viewCount) {
B. constructor() {
C. super (body, author, viewCount) {
D. Function Post (body, author, viewCount) {

Answer: A

NEW QUESTION # 98
A developer has two ways to write a function:
Option A:
function Monster(){
this.growl = ()=>{
console.log('Grr!');
}
}
Option B:
function Monster(){};
Monster.prototype.growl = ()=>{
console.log('Grr!');
}
After deciding on an option, the developer creates 1000 monster objects.
How many growl methods are created with Option A and Option B?

A. 1 methods for both
B. 1000 for both
C. 1 for Option A, 1000 for Option B
D. 1000 for Option A, 1 for Option B

Answer: A

NEW QUESTION # 99
Which two options are core Node.js modules?
Choose 2 answers

A. http
B. isotream
C. worker
D. exception

Answer: A,B

NEW QUESTION # 100
A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?

A. Cookies are read, but the key value is not set because the value is not URL encoded.
B. Cookies are read and the key value is set, and all cookies are wiped.
C. Cookies are not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.
D. Cookies are read and the key value is set, the remaining cookies are unaffected.

Answer: D

Explanation:
* document.cookie retrieves the cookie string.
* Setting document.cookie = ' key=John Smith ' adds or updates only that one cookie.
Important details:
* Writing to document.cookie does not overwrite all cookies .
* The browser does not require URL encoding , though it is recommended. Non-encoded spaces are allowed and automatically handled.
* document.cookies does not exist; the correct property is document.cookie.
Therefore, the correct behavior:
* Cookies are read.
* A new cookie key=John Smith is set.
* Existing cookies remain.
JavaScript Knowledge References (text-only)
* Writing document.cookie appends or updates cookies, not replaces them.
* document.cookie is both getter and setter for cookie strings.

NEW QUESTION # 101
......

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