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Salesforce JS-Dev-101 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Asynchronous Programming	13%	- Callback patterns - Promises and async/await - Event loop and asynchronous code execution
Topic 2: Objects, Functions, and Classes	25%	- JavaScript modules (export, import) - Function declarations, expressions, and arrow functions - ES6 Classes, constructors, methods, and inheritance - Higher-order functions and closures - Object creation, properties, and prototypal inheritance
Topic 3: Testing	7%	- Test-driven development principles - Automated testing strategies - Unit testing with Jest
Topic 4: Debugging and Error Handling	7%	- try-catch blocks - Logging strategies and debugging techniques
Topic 5: Browser and Events	17%	- Browser Developer Tools - DOM manipulation - Event handling, propagation, bubbling, and capturing
Topic 6: Variables, Types, and Collections	23%	- Variable declaration (var, let, const, scoping, hoisting) - Type coercion and type conversion - String manipulation and Date objects - Array manipulation (map, filter, reduce, forEach, find) - JSON parsing and stringification
Topic 7: Server Side JavaScript	8%	- Node.js applications - Salesforce API integration - Modules and file operations

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JS-Dev-101 Sample Questions, JS-Dev-101 Latest Test Discount

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q98-Q103):

NEW QUESTION # 98
Refer to the code below:
Let inArray =[ [ 1, 2 ] , [ 3, 4, 5 ] ];
Which two statements result in the array [1, 2, 3, 4, 5] ?
Choose 2 answers

A. []. Concat (... inArray);
B. [ ]. concat ( [ ....inArray ] );
C. [ ]. concat.apply(inArray, [ ]);
D. [ ]. Concat.apply ([ ], inArray);

Answer: A,D

NEW QUESTION # 99
Refer the code below.
x=3.14;
function myfunction() {
"use strict";
y=x;
}
z=x;
myFunction();

Answer:

Explanation:
See the Answer below in explanation

NEW QUESTION # 100
Refer to thefollowing code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

A. Export default class {foo() { return 'foo' ; }bar() { return 'bar' ; }}
B. const foo = () => { return 'foo';}const bar = () => {return 'bar'; }Export default foo, bar;
C. const foo = () => { return 'foo' ; }const bar = () => { return 'bar' ; }export { bar, foo }
D. // FooUtils.js and BarUtils.js existImport (foo) from '/path/FooUtils.js';Import (boo) from ' /path/NarUtils.js';

Answer: A,C

NEW QUESTION # 101
01 let a = "*";
02 let b = "**";
/ 7 x = 3;
04 console.log(a);
What is displayed when the code executes?

A. ReferenceError: a is not defined
B. undefined
C. a
D. null

Answer: B

NEW QUESTION # 102
A developer is setting up a Node.js server and is creating a script at the root of the source code, index.js, that will start the server when executed. The developer declares a variable that needs the folder location that the code executes from.
Which global variable can be used in the script?

A. this.path
B. window.location
C. __dirname
D. __filename

Answer: C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge:
In Node.js:
__filename is the absolute path to the current file (including file name).
__dirname is the absolute path to the directory that contains the current file.
window.location is a browser-only global, not available in Node.js.
this.path is not a standard Node.js global for path information.
The requirement is:
"the folder location that the code executes from."
That is exactly what __dirname provides.
So the correct choice is __dirname.
Concepts: Node.js globals, __filename, __dirname, Node vs browser environment.
________________________________________

NEW QUESTION # 103
......

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