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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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

NEW QUESTION # 24
Refer to the code below:
<html lang="en">
<tableonclick="console.log(Table log');">
<tr id="row1">
<td>Click me!</td>
</tr>
<table>
<script>
functionprintMessage(event) {
console.log('Row log');
}
Let elem = document.getElementById('row1');
elem.addEventListener('click', printMessage, false);
</script>
</html>
Which code change should be made for the console to log only Row log when 'Click me! ' is clicked?

A. Add.event.stopPropagation(); to window.onLoad event handler.
B. Addevent.removeEventListener(); to window.onLoad event handler.
C. Add event.stopPropagation(); to printMessage function.
D. Add event.removeEventListener(); toprintMessage function.

Answer: C

NEW QUESTION # 25
Refer to the code below:
console.log(''start);
Promise.resolve('Success') .then(function(value){
console.log('Success');
});
console.log('End');
What is the output after the code executes successfully?

A. StartEndSuccess
B. StartSuccessEnd
C. SuccessStartEnd
D. EndStartSuccess

Answer: A

NEW QUESTION # 26
Refer to the following code:

What is returned by the function call on line 13?

A. Null value
B. Undefined value.
C. Line 13 throws an error.
D. Undefined

Answer: C

NEW QUESTION # 27
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information thedeveloper has, which code logs an error at boost with an event?

A. Server.on ('error', (error) => {console.log('ERROR', error);});
B. Server.catch ((server) => {console.log('ERROR', error);});
C. Try{server.start();} catch(error) {console.log('ERROR', error);}
D. Server.error ((server) => {console.log('ERROR', error);});

Answer: A

NEW QUESTION # 28
A developer has the following array of hourly wages:
Let arr = (8, 5, 9, 75, 11, 25, 7, 75, , 13, 25);
For workers making less than $10 an hour rate should be multiple by 1.25 and returned in a new array.
How should the developer implement the request?

A. let arrl = arr.filter((val) => val < 10).map((num) -> num = 1.25);
B. let arrl = arr .rr.acArray ((val) => ( val < 10 )) ,map((num) => { num * 1.25 ));
C. let arrl = arr.filterBy((val) => val < 10 ).aapBy<(num) -> num = ..25 );
D. let arrl = arr-map((num) => { return ran * 1.25 }).filter((val) -> { return val < 10));

Answer: D

NEW QUESTION # 29
......

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