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| Section | Objectives |
|---|---|
| JavaScript Fundamentals | - Functions and Scope - Control Flow and Error Handling - Variables, Data Types, and Operators |
| Browser and DOM Interaction | - DOM Manipulation - Events and Event Handling |
| Asynchronous Programming | - API Calls and Data Fetching - Callbacks, Promises, and Async/Await |
| Object-Oriented JavaScript | - Objects and Prototypes - Classes and Inheritance |
| Salesforce Platform Integration | - Lightning Web Components (LWC) Basics - Working with Salesforce Data Models |
>> Salesforce JS-Dev-101 Accurate Answers <<
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NEW QUESTION # 114
Refer to the following object:
const cat ={
firstName: 'Fancy',
lastName: ' Whiskers',
Get fullName() {
return this.firstName + ' ' + this.lastName;
}
};
How can a developer access the fullName property for cat?
Answer: B
NEW QUESTION # 115
Which three browser specific APIs are available for developers to persist data between page loads?
Answer: C,E,F
Explanation:
A pattern for creating a new scope, not a persistence mechanism.
Variables inside an IIFE are still lost when the page reloads.
Thus, the three persistent browser APIs are:
localStorage
indexedDB
cookies
Explanation:
Comprehensive and Detailed Explanation From Exact Extract JavaScript knowledge:
We want mechanisms that persist data between page loads (i.e., after refresh or navigation), in the browser.
A . localStorage
Part of the Web Storage API.
Data persists across page reloads and browser restarts (until explicitly cleared).
Scoped per origin (protocol + host + port).
This is a correct persistent storage API.
B . indexedDB
A low-level, client-side NoSQL database in the browser.
Stores large amounts of structured data and persists across reloads and sessions.
This is also a correct persistent API.
C . cookies
Small key/value pairs stored by the browser and often sent with HTTP requests.
Can have expiration dates and persist across page loads and sessions.
They are a traditional persistence mechanism in browsers.
So cookies also qualify.
D . global variables
Global JS variables exist only for the life of the current page context.
When the page is refreshed or navigated away, they are lost.
They do not persist between page loads.
NEW QUESTION # 116
Refer to HTML below:
<div id ="main">
<div id = " card-00">This card is smaller.</div>
<div id = "card-01">The width and height of this card is determined by its contents.</div>
</div>
Which expression outputs the screen width of the element with the ID card-01?
Answer: B
NEW QUESTION # 117
Refer tothe code below:
What is the value of result after line 10 executes?
Answer: D
NEW QUESTION # 118
A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript TO ensure that visitors have a goodexperience, a script named personaliseContext needs to be executed when the webpage is fully loaded (HTML content and all related files ), in order to do some custom initialization.
Which statement should be used to call personalizeWebsiteContent based onthe above business requirement?
Answer: D
NEW QUESTION # 119
......
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