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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 2	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 3	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Topic 4	Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy falsy evaluations.
Topic 5	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q78-Q83):

NEW QUESTION # 78
Refer to the code below:

What is the result when the Promise in the execute function is rejected?

A. Resolved1 Resolved2 Resolved3Resolved4
B. Rejected
C. Rejected Resolved
D. Rejected1 Rejected2 Rejected3 Rejected Rejected Rejected4

Answer: C

NEW QUESTION # 79
Refer to the code below:

What is the value of result when the code executes?

A. 5-10
B. 10-10
C. 5-5
D. 10-5

Answer: B

NEW QUESTION # 80
A developer creates a simple webpage with an input field. When a user enters text and clicks the button, the actual value must be displayed in the console:
HTML:
<input type="text" value="Hello" name="input">
<button type="button">Display</button>
JavaScript:
01 const button = document.querySelector('button');
02 button.addEventListener('click', () => {
03 const input = document.querySelector('input');
04 console.log(input.getAttribute('value'));
05 });
When the user clicks the button, the output is always "Hello".
What needs to be done to make this code work as expected?

A. Replace line 04 with console.log(input.value);
B. Replace line 02 with button.addCallback("click", function() {
C. Replace line 03 with const input = document.getElementByIdName('input');
D. Replace line 02 with button.addEventListener("onclick", function() {

Answer: A

Explanation:
getAttribute('value')
This returns the initial HTML attribute, not the live, updated value.
Even if the user edits the text, the value attribute remains "Hello" because HTML attributes do not update dynamically.
Input elements have a property value that always reflects the live current text inside the field.
So:
input.value
returns the user-entered value.
Therefore, line 04 must use the property, not the attribute:
console.log(input.value);
This ensures the updated input value is displayed.
JavaScript knowledge references (text-only)
HTML attributes are static and retrieved using getAttribute().
DOM element properties (like value) represent the current live state.
Input value changes update the .value property, not the attribute.

NEW QUESTION # 81
Considering the implications of 'use strict' on line 04, which three statements describe the execution of the code?
Choose 3 answers

A. z is equal to 3.14.
B. 'use strict' has an effect only on line 05.
C. Line 05 throws an error.
D. 'use strict' has an effect between line 04 and the end of the file.
E. 'use strict' is hoisted, so it has an effect on all lines.

Answer: A,B,C

NEW QUESTION # 82
Refer to the code below:
Const myFunction = arr => {
Return arr.reduce((result, current) =>{
Return result = current;
}, 10};
}
What is the output of this function when called with an empty array ?

A. Returns 0
B. Returns 10
C. Throws an error
D. Returns NaN

Answer: B

NEW QUESTION # 83
......

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