Salesforce Certified JavaScript Developer (JS-Dev-101) practice questions & JavaScript-Developer-I reliable study & Salesforce Certified JavaScript Developer (JS-Dev-101) torrent vce

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Weight	Objectives
Browsers and Events	17%	- Browser APIs and Web Storage - Event handling, propagation, and delegation - Document Object Model (DOM) manipulation - Window and document object properties - Script loading and execution order
Server-Side JavaScript	8%	- Module system and require/import - Command-line tools and scripts - Core Node.js modules - Node.js fundamentals and runtime
Testing	7%	- Testing frameworks and assertions - Test doubles and mocks - Unit testing concepts - Code coverage and best practices
Asynchronous Programming	13%	- Callbacks and callback hell - Promises and chaining - Async/await syntax - Event loop and micro/macro tasks - Fetch API and HTTP requests
Variables, Types, and Collections	23%	- Working with strings, numbers, dates, and booleans - Truthy and falsy values - JSON parsing and usage - Array methods and data manipulation - Variable declaration and initialization - Type coercion and conversion rules
Objects, Functions, and Classes	25%	- Decorators and advanced function patterns - Function definitions, parameters, and scope - Closures and execution context - Class syntax, inheritance, and prototypes - Object creation, properties, and methods - Modules and imports/exports
Debugging and Error Handling	7%	- Defensive programming practices - Console methods and logging - Error types and exception handling - Debugging tools and breakpoints

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q119-Q124):

NEW QUESTION # 119
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?

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

Answer: A

NEW QUESTION # 120
A developer is asked to fix some bugs reported by users. To do that, the developer adds a breakpoint for debugging.
Function Car (maxSpeed, color){
This.maxspeed =masSpeed;
This.color = color;
Let carSpeed = document.getElementById(' CarSpeed');
Debugger;
Let fourWheels =new Car (carSpeed.value, 'red');
When the code execution stops at the breakpoint on line 06, which two types of information are available in the browser console ?
Choose 2 answers:

A. The style, event listeners and other attributes applied to the carSpeed DOM element
B. The information stored in the window.localStorage property
C. A variable displaying the number of instances created for the Car Object.
D. The values of the carSpeed and fourWheels variables

Answer: A,B

NEW QUESTION # 121
Refer tothe code below:

What is the value of result after line 10 executes?

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

Answer: B

NEW QUESTION # 122
Given the code below:

What is logged to the console?

A. 1 2 5 3 4
B. 1 2 4 3 5
C. 2 5 1 3 4
D. 2 1 4 3 5

Answer: C

NEW QUESTION # 123
Refer to the following code block:

What is the console output?

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

Answer: B

NEW QUESTION # 124
......

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