Salesforce - JavaScript-Developer-I - Salesforce Certified JavaScript Developer (JS-Dev-101)–Professional Detail Explanation

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Salesforce Platform Integration	- Calling Apex methods from JavaScript - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage
Testing and Debugging	- Unit testing principles - Debugging techniques and tools
Browser and DOM Interaction	- Event handling and propagation - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal
JavaScript Language Fundamentals	- Functions, scope, and closures - ES6+ syntax and features - Data types, variables, and operators
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 (Q20-Q25):

NEW QUESTION # 20
Refer to the following code:

Which two statement could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers

A. Object.assign (leo. Tiger);
B. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
C. Object.assign (leo, tony);
D. leo.roar = () => { console.log('They\'re pretty good!'); );

Answer: C,D

NEW QUESTION # 21
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accurately tests the above code?

A. Console.assert (await functionUnderTest(true), ' not OK ')
B. Console.assert (await functionUnderTest(true), ' OK ')
C. Console.assert (await functionUnderTest(true), ' not OK ')
D. Console.assert (await functionUnderTest(true), 'OK')

Answer: D

NEW QUESTION # 22
Refer to the code below:

What is displayed when myfunction(true) is called?

A. 2 2 1 2
B. 2 2 1 1
C. 2 2 undefined undefined
D. 2 2 2 2

Answer: B

NEW QUESTION # 23
Given the code below:

Which method can be provide a visual representation of the list if users and to allow sorting by the name or email attributes.

A. Console.group (userList);
B. Console,table (userslist);
C. Console.groupCollapsed (userslist);
D. Console.info (userlist);

Answer: A

NEW QUESTION # 24
Refer to the code:

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

A. Size
B. Owner
C. canTalk
D. Name
E. Type

Answer: A,C,E

NEW QUESTION # 25
......

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