Free Salesforce JavaScript-Developer-I Exam Dumps Questions & Answers

Given the code:
const copy = JSON.stringify([new String( ' false ' ), new Boolean(false), undefined]); What is the value of copy?

• A.  ' [false, {}] '
• B.  ' [ " false " , false, null] '
• C.  ' [ " false " , false, undefined] '
• D.  ' [ " false " , {}] '

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.fullName()
• C.  dog.get.fullName
• D.  dog.function.fullName()

A developer creates a simple webpage with an input field. When a user enters text and clicks the button, the actual value must be displayed in the console:
HTML:
< input type= " text " value= " Hello " name= " input " >
< button type= " button " > Display < /button >
JavaScript:
01 const button = document.querySelector( ' button ' );
02 button.addEventListener( ' click ' , () = > {
03 const input = document.querySelector( ' input ' );
04 console.log(input.getAttribute( ' value ' ));
05 });
When the user clicks the button, the output is always " Hello " .
What needs to be done to make this code work as expected?

• A.  Replace line 02 with button.addEventListener( " onclick " , function() {
• B.  Replace line 03 with const input = document.getElementByIdName( ' input ' );
• C.  Replace line 04 with console.log(input.value);
• D.  Replace line 02 with button.addCallback( " click " , function() {

Refer to the code:
01 function execute() {
02 return new Promise((resolve, reject) = > reject());
03 }
04 let promise = execute();
05
06 promise
07 .then(() = > console.log( ' Resolved1 ' ))
08 .then(() = > console.log( ' Resolved2 ' ))
09 .then(() = > console.log( ' Resolved3 ' ))
10 .catch(() = > console.log( ' Rejected ' ))
11 .then(() = > console.log( ' Resolved4 ' ));
What is the result when the Promise in the execute function is rejected?

• A.  Rejected
• B.  Rejected Resolved4
• C.  Resolved1 Resolved2 Resolved3 Resolved4
• D.  Resolved1 Resolved2 Resolved3 Rejected Resolved4

A page loads 50+ < div class= " ad-library-item " > elements, all ads.
Developer wants to quickly and temporarily remove them.
Options:

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