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| Section | Objectives |
|---|---|
| Topic 1: JavaScript Language Fundamentals | - ES6+ syntax and features - Data types, variables, and operators - Functions, scope, and closures |
| Topic 2: Asynchronous JavaScript | - Error handling in async workflows - Event loop and concurrency model - Promises and async/await |
| Topic 3: Salesforce Platform Integration | - Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript |
| Topic 4: Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| Topic 5: Browser and DOM Interaction | - Browser APIs (fetch, storage, timers) - Event handling and propagation - DOM manipulation and traversal |
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NEW QUESTION # 108
Which three actions can be done using the JavaSript browser console?
Choose 3 answer
Answer: A,B,E
NEW QUESTION # 109
Given the code below:
01 function GameConsole (name) {
02 this.name = name;
03 }
04
05 GameConsole.prototype.load = function(gamename) {
06 console.log( ` $(this.name) is loading a game : $(gamename) ...`);
07 )
08 function Console 16 Bit (name) {
09 GameConsole.call(this, name) ;
10 }
11 Console16bit.prototype = Object.create ( GameConsole.prototype) ;
12 //insert code here
13 console.log( ` $(this.name) is loading a cartridge game : $(gamename) ...`);
14 }
15 const console16bit = new Console16bit(' SNEGeneziz ');
16 console16bit.load(' Super Nonic 3x Force ');
What should a developer insert at line 15 to output the following message using the method ?
> SNEGeneziz is loading a cartridge game: Super Monic 3x Force . . .
Answer: A
NEW QUESTION # 110
A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.
The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server.js file will start the server. The developer wants to debug the Node.js server only using the terminal.
Which command can the developer use to open the CLI debugger in their current terminal window?
(With corrected typing errors: node_inspect # node inspect, node_start_inspect # node start inspect.)
Answer: D
NEW QUESTION # 111
A developer uses a parsed JSON string to work with user information as in the block below:
01 const userInformation = {
02 " id " : " user-01 " ,
03 " email " : " user01@universalcontainers.demo " ,
04 " age " : 25
05 };
Which two options access the email attribute in the object?
Answer: A,B
Explanation:
userInformation is a plain JavaScript object:
{
id: " user-01 " ,
email: " user01@universalcontainers.demo " ,
age: 25
}
You can access object properties in two standard ways:
* Dot notation : object.propertyName
* Bracket notation : object[ ' propertyName ' ]
Apply to each option:
* A. userInformation.email
* Correct dot notation; accesses " user01@universalcontainers.demo " .
* B. userInformation.get( " email " )
* .get() is a method on Map instances, not on plain objects.
* A regular object does not have a .get method; this would be TypeError.
* C. userInformation[ " email " ]
* Correct bracket notation; string " email " is used as the property key.
* Returns " user01@universalcontainers.demo " .
* D. userInformation[email]
* Here email is treated as a variable, not a string literal.
* Unless there is a variable named email defined with a value matching a property key, this will either:
* Throw a ReferenceError (if email is not defined), or
* Use the value of email as a computed key (not what is intended here).
* It is not the correct way to access the " email " property literal.
Therefore, the correct ways are:
The answer: A, C
Relevant concepts: object property access (. vs []), plain objects vs Map, literal property names vs computed property names.
NEW QUESTION # 112
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?
Answer: C
NEW QUESTION # 113
......
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