[Mar-2024] Pass Salesforce JavaScript-Developer-I Tests Engine pdf – All Free Dumps [Q22-Q36]

Q22. A developer wants to set up a secure web server with Node.js. The developer creates a
directory locally called app-server, and the first file is app-server/index.js
Without using any third-party libraries, what should the developer add to index.js to create the
secure web server?

Q23. The developer wants to test the code:
Const toNumber = (strOrNum) => + strOrNum;
Which two tests are most accurate for this code? Choose 2 answers

Q24. A developer writes the code below to calculate the factorial of a given number.

What is the result of executing line 04?

Q25. Which statement accurately describes an aspect of promises?

Q26. developer publishes a new version of a package with new features that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?

Q27. Refer to the code below:

What is result of the code block?

Q28. 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?

Q29. In the browser, the window object is often used to assign variables that require the broadcast scope in an application Node is application do not have access to the window object by default.
Which two methods are used to address this? Choose 2 answer

Q30. A developer is required to write a function that calculates the sum of elements in an array but is getting undefined every time the code is executed. The developer needs to find what is missing in the code below.

Which option makes the code work as expected?

Q31. Refer to the code below:

After running this code, which result is displayed on the console?

Q32. Refer to the code declarations below:

Which three expressions return the string JavaScript?
Choose 3 answers

Q33. Given the following code:
let x = null;
console.log(typeof x);
What is the output?

Q34. is below:
<input type=”file” onchange=”previewFile()”>
<img src=”” height=”200″ alt=”Image Preview…”/>
The JavaScript portion is:
01 function previewFile(){
02 const preview = document.querySelector(‘img’);
03 const file = document.querySelector(‘input[type=file]’).files[0];
04 //line 4 code
05 reader.addEventListener(“load”, () => {
06 preview.src = reader.result;
07 },false);
08 //line 8 code
09 }
In lines 04 and 08, which code allows the user to select an image from their local
computer , and to display the image in the browser?

Q35. 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

Q36. Refer to the code:

Given the code above, which three properties are set pet1?
Choose 3 answers: