Expert Answers to Salesforce Exam JavaScript-Developer-I Questions

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Salesforce Developer Salesforce Certified JavaScript Developer I (SP25)

Salesforce Certified JavaScript Developer I (SP25)

Last Update May 10, 2026
Total Questions : 219

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Questions 2

A developer wants to create an object from a function in the browser using the code

below:

Function Monster() { this.name = ‘hello’ };

Const z = Monster();

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

Options:

The z variable is assigned the correct object.

The z variable is assigned the correct object but this.name remains undefined.

Window.name is assigned to ‘hello’ and the variable z remains undefined.

Window.m is assigned the correct object.

Discussion 0

Questions 3

Given the JavaScript below:

01 function filterDOM (searchString) {

02 const parsedSearchString = searchString && searchString.toLowerCase() ;

03 document.quesrySelectorAll(‘ .account’ ) . forEach(account => (

04 const accountName = account.innerHTML.toLOwerCase();

05 account. Style.display = accountName.includes(parsedSearchString) ? /*Insert

code*/;

06 )};

07 }

Which code should replace the placeholder comment on line 05 to hide accounts that do

not match the search string?

Options:

‘ name ’ : ‘ block ’

‘ Block ’ : ‘ none ’

‘ visible ’ : ‘ hidden ’

‘ hidden ’ : ‘ visible ’

Discussion 0

Questions 4

A developer creates an object where its properties should be immutable and prevent

properties from being added or modified.

Which method should be used to execute this business requirement ?

Options:

Object.const()

Object.eval()

Object.lock()

Object.freeze()

Discussion 0

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Questions 5

Refer to the code snippet below:

Let array = [1, 2, 3, 4, 4, 5, 4, 4];

For (let i =0; i < array.length; i++)

if (array[i] === 4) {

array.splice(i, 1);

}

What is the value of array after the code executes?

Options:

[1, 2, 3, 4, 5, 4, 4]

[1, 2, 3, 4, 4, 5, 4]

[1, 2, 3, 5]