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The Salesforce JavaScript-Developer-I exam includes multiple-choice questions that cover a range of topics related to JavaScript development on the Salesforce platform. These topics include data modeling, user interface development, debugging and testing, and security. JavaScript-Developer-I Exam is designed to test the ability of developers to design and develop custom applications that meet the needs of their clients.

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Free PDF 2026 Salesforce Marvelous JavaScript-Developer-I: Salesforce Certified JavaScript Developer (JS-Dev-101) Materials

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Salesforce JavaScript-Developer-I Exam is designed for candidates who have a good understanding of JavaScript programming language and its applications in Salesforce. JavaScript-Developer-I exam measures the candidate's knowledge in different areas, such as Apex, Visualforce, and Lightning components. It tests the candidate's ability to design and implement client-side and server-side logic, create custom user interfaces, and integrate with external systems using JavaScript.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q102-Q107):

NEW QUESTION # 102
Refer to the following object:
const dog = {
firstName: ' Beau ' ,
lastName: ' Boo ' ,
get fullName() {
return this.firstName + ' ' + this.lastName;
}
};
How can a developer access the fullName property for dog?

A. dog.fullName()
B. dog.function.fullName()
C. dog.get.fullName
D. dog.fullName

Answer: D

Explanation:
The correct answer is A .
This object uses a getter :
get fullName() {
return this.firstName + ' ' + this.lastName;
}
A getter looks like a method when it is defined, but it is accessed like a normal property.
So the correct access syntax is:
dog.fullName
That returns:
" Beau Boo "
The important distinction is:
dog.fullName
not:
dog.fullName()
Because fullName is a getter property, not a regular function property.
Option B is incorrect because calling dog.fullName() tries to call the returned string as a function. Since " Beau Boo " is not a function, that would cause a TypeError.
Option C is incorrect because there is no get object inside dog.
Option D is incorrect because there is no function object inside dog, and getters are not accessed that way.
Therefore, the verified answer is A .

NEW QUESTION # 103
Refer to the code below:

Which two function can replace line 01 and return 58 to sum? Choose 2 answers

A. const addBy = (num1) num1 + num2
B. const addBy = num1 (num2) => num1 + num2 ;
C. Const addby = function (num1) (
Return function (num2) (
}
}
D. const addBy = function (num1) {
Return function (num2) {
}
}

Answer: B,D

NEW QUESTION # 104
Given the code below:

What is logged to the console'

A. 1 2 3 4 5
B. 1 2 5 3 4
C. 2 5 3 4 1
D. 2 5 1 3 4

Answer: C

NEW QUESTION # 105
A developer needs to test this functions:

Which two assert statements are valid tests for this function?

A. Console.assert(sum3((1, '2' ]) 12 );
B. Console.assert(sum3 ([-3, 2]) -1) ;
C. Console.assert(sum3 (['hello' 2, 3, 4]) NaN);
D. Console.assert(sum3([0]) 0) ;

Answer: A,B

NEW QUESTION # 106
Universal Containers recently launched its new landing page to host a crowd-funding campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

A. Use the browser to execute a script that removes all the element containing the class ad-library-item.
B. Use the browser console to execute a script that prevents the load event to be fired.
C. Use the DOM inspector to prevent the load event to be fired.
D. Use the DOM inspector to remove all the elements containing the class ad-library-item.

Answer: A

NEW QUESTION # 107
......

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