Salesforce Certified JavaScript Developer I Exam Questions
Salesforce Certified JavaScript Developer I (Page 7 )

Consider type coercion, what does the following expression evaluate to? True + 3 + `100' + null

A Developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;

console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
console.assert(res=== 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function ? Choose 2 answers

A developer creates a simple webpage with an input field.
When a user enters text in the inputfield and clicks the button, the actual value of the field must be displayed in the console.
Here is the HTML file content:
<input type =" text" value="Hello" name ="input">
<button type ="button" >Display </button>
The developer wrote the javascript codebelow:
Const button = document.querySelector(`button');
button.addEvenListener(`click', () => (
Const input = document.querySelector(`input');
console.log(input.getAttribute(`value'));
When the user clicks the button, the output is always "Hello".
What needs to be done make this code work as expected?

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 businessrequirement ?

A developer has an ErrorHandler module that contains multiple functions.
What kind of export be leverages so that multiple functions can beused?