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Salesforce CRT-600 Exam Questions
Prepare for your JavaScript Developer I Certification Exam (Page 7 )

Updated On: 18-Mar-2026
Page 7 of 46
PDF with 224 Questions

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

  1. 104
  2. 4100
  3. `3100null'
  4. `4100null'

Answer(s): D



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

  1. The line 02 assertion passes.
  2. The line 02 assertion fails
  3. The line 05 assertion passes.
  4. The line 05 assertion fails.

Answer(s): A,D



A developer creates a simple webpage with an input field.
When a user enters text in the input field 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 code below:
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?

  1. Replace line 04 with console.log(input .value);
  2. Replace line 03 with const input = document.getElementByName(`input');
  3. Replace line 02 with button.addEventListener("onclick", function() {
  4. Replace line 02 with button.addCallback("click", function() {

Answer(s): A



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 ?

  1. Object.const()
  2. Object.eval()
  3. Object.lock()
  4. Object.freeze()

Answer(s): D



A developer has an ErrorHandler module that contains multiple functions.

What kind of export be leverages so that multiple functions can be used?

  1. Named
  2. All
  3. Multi
  4. Default

Answer(s): A



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Viewing questions 31 - 35 out of 224 questions



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