JavaScript-Developer-I Valid Exam Labs | JavaScript-Developer-I Practice Questions

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Salesforce JavaScript-Developer-I Certification Exam is designed to test the skills and knowledge of individuals who work with Salesforce’s Lightning Web Components (LWC) and Aura Components. JavaScript-Developer-I exam is intended for developers who have experience building custom applications on the Salesforce platform using JavaScript. Salesforce Certified JavaScript Developer I Exam certification demonstrates the ability to design, develop, and deploy scalable and maintainable custom applications that meet the requirements of businesses and organizations.

Salesforce Certified JavaScript Developer I Exam Sample Questions (Q211-Q216):

NEW QUESTION # 211
A developer creates a generic function to log custom messages In the console. To do this, the function below is implemented.

Which three console logging methods allow the use of string substitution in line 02?
Choose 3 answers

A. Message
B. Info
C. Assert
D. Log
E. error

Answer: A,C,E

NEW QUESTION # 212
Refer to the code below:

What is the output of this function when called with an empty array?

A. Return 5
B. Return Infinity
C. Return NaN
D. Return 0

Answer: A

NEW QUESTION # 213
Refer to the following code:
01 function Tiger(){
02 this.Type = 'Cat';
03 this.size = 'large';
04 }
05
06 let tony = new Tiger();
07 tony.roar = () =>{
08 console.log('They're great1');
09 };
10
11 function Lion(){
12 this.type = 'Cat';
13 this.size = 'large';
14 }
15
16 let leo = new Lion();
17 //Insert code here
18 leo.roar();
Which two statements could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers.

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

Answer: B,D

NEW QUESTION # 214
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 console to execute a script that prevents the load event to be fired.
B. Use the browser to execute a script that removes all the element containing the class ad-library-item.
C. Use the DOM inspector to remove all the elements containing the class ad-library-item.
D. Use the DOM inspector to prevent the load event to be fired.

Answer: B

NEW QUESTION # 215
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the function to run once after five seconds.
What is the correct syntax to schedule this function?

A. setTimeout (formatName('John', ''Doe'), 5000);
B. setTimout(() => { formatName("John', 'Doe') }, 5000);
C. setTimeout (formatName(), 5000, "John", "BDoe");
D. setTimeout ('formatName', 5000, 'John", "Doe');

Answer: D

NEW QUESTION # 216
......

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