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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?

A. JSON.stringify and JSON.parse
B. JSON.encode and JSON.decode
C. JSON.serialize and JSON.deserialize
D. JSON.parse and JSON.deserialize

Answer: A

NEW QUESTION # 39
Refer to the code below:
For (let number =2: number <= S; number += 1) ( // insert code statement here The developer needs to insert a code statement in the location shown. The code statement has these requirements:
1. Does not require an import
2. Logs an error when the Boolean statement evaluates to false
3. Works In both the browser and Node.js
Which statement meet these requirements?

A. Assert (number $ 2 == 0);
B. Console. Assert ( number $ 2 == 0 ) ;
C. Console. error (number $ 2 == 0) ;
D. Console. Debug (number $ 2 == 0) ;

Answer: B

NEW QUESTION # 40
Refer the code below.
x=3.14;
function myfunction() {
"use strict";
y=x;
}
z=x;
myFunction();

Answer:

Explanation:
Z is equal to 3.14
Use strict has effect only on line 5.
Line 5 throws an error

NEW QUESTION # 41
Refer to the expression below:
Let x = ('1' + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?

A. Let x = (1 + 2 ) == ( 6 / 2);
B. Let x = (1 + 2) == ( '6' / 2);
C. Let x = ('1' + 2) == ( 6 * 2);
D. Let x = ('1' + ' 2') == ( 6 * 2);

Answer: C

NEW QUESTION # 42
developer is trying to convince management that their team will benefit from using
Node.js for a backend server that they are going to create. The server will be a web server that
handles API requests from a website that the team has already built using HTML, CSS, and
JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
Choose 3 answers:

A. Executes server-side JavaScript code to avoid learning a new language.
B. Performs a static analysis on code before execution to look for runtime errors.
C. User non blocking functionality for performant request handling .
D. I nstalls with its own package manager to install and manage third-party libraries.
E. Ensures stability with one major release every few years.

Answer: B,C,D

NEW QUESTION # 43
......

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