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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

>> JavaScript-Developer-I Valid Test Topics <<

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q135-Q140):

NEW QUESTION # 135
A developer wants to use a module named universalContainersLib andthen call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A. import * as lib from '/path/universalContainersLib.js';lib.foo();lib. bar ();
B. import{foo,bar} from '/path/universalCcontainersLib.js';foo():bar()?
C. import * from '/path/universalContainersLib.js';universalContainersLib. foo ()7universalContainersLib.bar ();
D. import all from
'/path/universalContainersLib.js';universalContainersLib.foo();universalContainersLib.bar ();

Answer: A

NEW QUESTION # 136
Which three options show valid methods for creating a fat arrow function?
Choose 3 answers

A. ( ) => ( console.log(' executed ') ;)
B. X,y,z => ( console.log(' executed ') ;)
C. x => ( console.log(' executed ') ; )
D. (x,y,z) => ( console.log(' executed ') ;)
E. [ ] => ( console.log(' executed ') ;)

Answer: C,D

NEW QUESTION # 137
A developer wants to create an object from a function in the browser using the code below.

What happens due to the lack of the mm keyword on line 02?

A. The m variable is assigned the correct object.
B. window.name is assigned to 'hello' and the variable = remains undefined.
C. The m variable is assigned the correct object but this.name remains undefined.
D. window.m Is assigned the correct object.

Answer: B

NEW QUESTION # 138
A developer is required to write a function that calculates the sum of elements in an
array but is getting undefined every time the code is executed. The developer needs to find
what is missing in the code below.
Const sumFunction = arr => {
Return arr.reduce((result, current) => {
//
Result += current;
//
), 10);
);
Which option makes the code work as expected?

A. Replace line 02 with return arr.map(( result, current) => (
B. Replace line 04 with result = result +current;
C. Replace line 05 with return result;
D. Replace line 03 with if(arr.length == 0 ) ( return 0; )

Answer: C

NEW QUESTION # 139
A developer wrote a fizzbuzz function that when passed in a number, returns the
following:
● 'Fizz' if the number is divisible by 3.
● 'Buzz' if the number is divisible by 5.
● 'Fizzbuzz' if the number is divisible by both 3 and 5.
● Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuzz function?
Choose 2 answers

A. let res = fizzbuzz(15);
console.assert ( res === ' fizzbuzz ' )
B. let res = fizzbuzz(3);
console.assert ( res === ' buzz ' )
C. let res = fizzbuzz(5);
console.assert ( res === ' ' );
D. let res = fizzbuzz(Infinity);
console.assert ( res === ' ' )

Answer: A,B,D

NEW QUESTION # 140
......

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