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Salesforce JS-Dev-101 Exam Syllabus Topics:

Section	Objectives
Topic 1: Object-Oriented JavaScript	- Objects and Prototypes - Classes and Inheritance
Topic 2: JavaScript Fundamentals	- Functions and Scope - Variables, Data Types, and Operators - Control Flow and Error Handling
Topic 3: Browser and DOM Interaction	- Events and Event Handling - DOM Manipulation
Topic 4: Salesforce Platform Integration	- Lightning Web Components (LWC) Basics - Working with Salesforce Data Models
Topic 5: Asynchronous Programming	- API Calls and Data Fetching - Callbacks, Promises, and Async/Await

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q114-Q119):

NEW QUESTION # 114
Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.
* Address this problem, UC decides to implement a debounce function on string change handler.
What are three key steps to implement this debounce function?
Choose 3 answers:

A. When thesearch string changes, enqueue the request within a setTimeout.
B. If there is an existing setTimeout and the search string change, allow the existingsetTimeout to finish, and do not enqueue a new setTimeout.
C. Ensure that the network request has the property debounce set to true.
D. Store the timeId of the setTimeout last enqueued by the search string change handle.
E. If there is an existing setTimeout and the search string changes, cancel the existingsetTimeout using thepersisted timerId and replace it with a new setTimeout.

Answer: A,B,C

NEW QUESTION # 115
Refer to the following code block:

What is the console output?

A. > Uncaught Reference Error
B. > Jackie got 70% on test.
C. > Better student Jackie got 100% on test.
D. > Better student Jackie got 70% on test.

Answer: C

NEW QUESTION # 116
Refer to the following array:
Let arr1 = [ 1,2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?

A. Let arr2 = arr1.sort();
B. Let arr2 = Array.from(arr1);
C. Let arr2 = arr1.slice(0, 5);
D. Let arr2 = arr1;

Answer: B,C

NEW QUESTION # 117
Corrected code:
function Person() {
this.firstName = "John";
}
Person.prototype = {
job: x => "Developer"
};
const myFather = new Person();
const result = myFather.firstName + " " + myFather.job();
What is the value of result after line 10 executes?

A. "John undefined"
B. Error: myFather.job is not a function
C. "John Developer"
D. "undefined Developer"

Answer: C

Explanation:
The verified answer is A.
This constructor function runs when new Person() is called:
function Person() {
this.firstName = "John";
}
So this line:
const myFather = new Person();
creates an object like this:
{
firstName: "John"
}
Then the prototype is assigned a method named job:
Person.prototype = {
job: x => "Developer"
};
Because myFather is created from Person, it can access properties and methods from Person.prototype.
So:
myFather.firstName
returns:
"John"
And:
myFather.job()
returns:
"Developer"
Therefore:
const result = myFather.firstName + " " + myFather.job();
becomes:
const result = "John" + " " + "Developer";
Final value:
"John Developer"
Option B is incorrect because job() returns "Developer", not undefined.
Option C is incorrect because job exists on Person.prototype, so it is callable.
Option D is incorrect because firstName is assigned inside the constructor.
Therefore, the verified answer is A.

NEW QUESTION # 118
A developer has a fizzbuzz function that, when passed in a number, returns the following:
- 'fizz' if the number is divisible by 3.
- 'buzz' if the number is divisible by 5.
- 'fizzbuzz' if the number is divisible by both 3 and 5.
- empty string if the number is divisible by neither 3 or 5.
Which two test cases properly test scenarios for the fizzbuzz function?
Choose 2 answers

A. let res = fizzbuzz(NaN);
console.assert(isNaN(res));
B. let res = fizzbuzz(15);
console.assert(res === 'fizzbuzz');
C. let res = fizzbuzz(3);
console.assert(res === 'buzz');
D. let res = fizzbuzz(Infinity);
console.assert(res === '');

Answer: B,D

NEW QUESTION # 119
......

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