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Salesforce Certified JavaScript Developer I

Exam Details

  • Exam Code
    :JAVASCRIPT-DEVELOPER-I
  • Exam Name
    :Salesforce Certified JavaScript Developer I
  • Certification
    :Salesforce Certifications
  • Vendor
    :Salesforce
  • Total Questions
    :223 Q&As
  • Last Updated
    :Mar 28, 2025

Salesforce Salesforce Certifications JAVASCRIPT-DEVELOPER-I Questions & Answers

  • Question 161:

    Which two console logs output NaN? Choose 2 answers | |

    A. console.log(10 / Number('5) ) ;

    B. console.log(parseInt ' ("two')) ;

    C. console.log(10 / 0);

    D. console.loeg(10 / 'five');

  • Question 162:

    A developer creates a generic function to log custommessages in the console. To do this, the function below is implemented.

    01 function logStatus(status){

    02 console./*Answer goes here*/{`Item status is: %s', status};

    03 }

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

    A. Assert

    B. Log

    C. Message

    D. Info

    E. Error

  • Question 163:

    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 insidethe 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 DOM inspector to prevent the load eventto 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 browser console to execute a scriptthat prevents the load event to be fired.

  • Question 164:

    A developer is setting up a Node,js server and is creating a script at the root of the source code, index,js, that will start the server when executed. The developer declares a variable that needs the folder location that the code executes from.

    Which global variable can be used in the script?

    A. window.location

    B. _filename

    C. _dirname

    D. this.path

  • Question 165:

    A developer creates an object where its properties should be immutable and prevent properties from being added or modified.

    Which method should beused to execute this business requirement ?

    A. Object.const()

    B. Object.eval()

    C. Object.lock()

    D. Object.freeze()

  • Question 166:

    A developer has the function, shown below, that is called when a page loads.

    function onload() {

    console.log("Page has loaded!");

    }

    Where can the developer see the log statement after loading the page in the browser?

    A. Terminal running the web server.

    B. Browser performance toots

    C. Browser javaScript console

    D. On the webpage.

  • Question 167:

    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?

    A. Option A

    B. Option B

    C. Option C

    D. Option D

  • Question 168:

    A developer wrote the following code:

    01 let X = object.value; 03 try { 04 handleObjectValue(X); 05 } catch (error) { 06 handleError(error); 07 }

    The developer has agetNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.

    How can the developer change the code to ensure this behavior?

    A. 03 try{ 04 handleObjectValue(x); 05 } catch(error){ 06handleError(error); 07 } then { 08 getNextValue(); 09 }

    B. 03 try{ 04 handleObjectValue(x); 05 } catch(error){ 06 handleError(error); 07 } finally { 08 getNextValue(); 10 }

    C. 03 try{ 04 handleObjectValue(x); 05 } catch(error){ 06 handleError(error); 07 } 08 getNextValue();

    D. 03 try { 04 handleObjectValue(x) 05 ........................

  • Question 169:

    Refer to the HTML below:

    Which JavaScript statement results in changing " The Lion."?

    A. document.querySelectorAll(`$main $TONY').innerHTML = '" The Lion

    B. document.querySelector(`$main li:second-child').innerHTML = "The Lion ';

    C. document.querySelector(`$main li.Tony').innerHTML = '" The Lion ';

    D. document.querySelector(`$main li:nth-child(2)'),innerHTML = " The Lion. ';

  • Question 170:

    Refer to the code below:

    [table]

    Which code change should be made for the console to log only Row log when `Click me! ' is clicked?

    A. Add.event.stopPropagation(); to window.onLoad event handler.

    B. Add event.stopPropagation(); to printMessage function.

    C. Add event.removeEventListener(); to window.onLoad event handler.

    D. Add event.removeEventListener(); toprintMessage function.

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