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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q121-Q126):

NEW QUESTION # 121
Refer to the code below:

What is the value of foobDienu1 after the code executes?

A. {'Garlic bread'}
B. {'Pizza' , Burger' , French fries ' , garlic bread; }
C. {'Garlic bread', Pizza' , Burger' , French fries'}
D. {'Pizza' , Burger' , French fries '}

Answer: B

NEW QUESTION # 122
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1,2]?
Choose 3 answer

A. let x = arr.filter ((a) => 2 }) ;
B. let x = arr.slice (2);
C. let x = arr. slice (0, 2);
D. let x arr.filter((a) => (return a <= 2 });
E. let x =arr.splice(0, 2);

Answer: C,D,E

NEW QUESTION # 123
Refer to the code below:

Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a specific element, myElement on the page had been clicked?

Answer:

Explanation:
event.target.id =='myElement'

NEW QUESTION # 124
In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods are used to address this ?
Choose 2 answers

A. Use the document object instead of the window object.
B. Assign variables to module.exports and require them as needed.
C. Create a new window object in the root file.
D. Assign variables to the global object.

Answer: D

NEW QUESTION # 125
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

A. C
B. B
C. D
D. A

Answer: D

NEW QUESTION # 126
......

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