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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Weight	Objectives
Objects, Functions, and Classes	25%	- Prototypal inheritance - Arrow functions - ES6 classes and inheritance - Variable scope and closures - Modules and decorators - Function declarations and expressions - Object creation and manipulation - Execution flow and context - Higher-order functions
Asynchronous Programming	13%	- Async/Await syntax - Asynchronous patterns for business requirements - Callbacks - Event loop and execution flow - Promises (creation, chaining, error handling)
Debugging and Error Handling	7%	- Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types - Breakpoints and code inspection
Variables, Types, and Collections	23%	- Primitive and complex data types - JSON parsing and manipulation - Arrays and collections - Variable declarations and initialization - Type coercion and conversion - Truthy and falsy evaluations - Strings, numbers, and dates
Server Side JavaScript	8%	- Core Node.js modules - Node.js fundamentals - Package management (npm) - Server-side JavaScript implementations - CLI commands
Testing	7%	- Test effectiveness evaluation - Writing and modifying unit tests - Test coverage and reliability - Unit testing concepts
Browser and Events	17%	- Interacting with forms and user input - Event handling and listeners - Browser-specific APIs - Browser Developer Tools usage - DOM manipulation - Event propagation (bubbling and capturing)

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q111-Q116):

NEW QUESTION # 111
A class was written to represent items for purchase in an online store, and a secondclass Representing items that are on sale at a discounted price. THe constructor sets the name to the first value passed in. The pseudocode is below:
Class Item {
constructor(name, price) {
... // Constructor Implementation
}
}
Class SaleItem extends Item {
constructor (name, price, discount) {
...//Constructor Implementation
}
}
There is a newrequirement for a developer to implement a description method that will return a brief description for Item and SaleItem.
Let regItem =new Item('Scarf', 55);
Let saleItem = new SaleItem('Shirt' 80, -1);
Item.prototype.description = function () { return 'This is a ' + this.name; console.log(regItem.description()); console.log(saleItem.description()); SaleItem.prototype.description = function () { return 'This is a discounted ' + this.name; } console.log(regItem.description()); console.log(saleItem.description()); What is the output when executing the code above ?

A. This is a ScarfThis is a ShirtThis is a ScarfThis is a discounted Shirt
B. This is aScarfUncaught TypeError: saleItem.description is not a functionThis is a ShirtThis is a did counted Shirt
C. This is a ScarfThis is a ShirtThis is a discounted ScarfThis is a discounted Shirt
D. This is a ScarfUncaught TypeError: saleItem.description is not a functionThis is aScarfThis is a discounted Shirt

Answer: A

NEW QUESTION # 112
Refer to the following code block:

What is the console output?

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

Answer: D

NEW QUESTION # 113
A developer creates a class that represents a blog post based on the requirements that a Post should have a body, author, and view count. The code is shown below:

Which statement should be inserted in the placeholder on line 02 to allow for a variable to be sent to a new instance of a port with the three attributes correctly populated?

A. Function Post (body, author, viewCount) (
B. Constructor (body, author, viewCount) (
C. Constructor ( ) (
D. Super (body, author, viewCount) (

Answer: B

NEW QUESTION # 114
A developer wants to use a module named universalContainersLib andthen call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A. import all from
'/path/universalContainersLib.js';universalContainersLib.foo();universalContainersLib.bar ();
B. import * from '/path/universalContainersLib.js';universalContainersLib. foo ()7universalContainersLib.bar ();
C. import{foo,bar} from '/path/universalCcontainersLib.js';foo():bar()?
D. import * as lib from '/path/universalContainersLib.js';lib.foo();lib. bar ();

Answer: D

NEW QUESTION # 115
A developer writes the code below to calculate the factorial of a given number.

What is the result of executing line 04?

A. RuntimeError
B. -Infinity
C. 0
D. 1

Answer: A

NEW QUESTION # 116
......

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