JS-Dev-101 Valid Test Fee, Exam JS-Dev-101 Questions Fee

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Salesforce JS-Dev-101 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I - Multiple Choice Exam (JS-Dev-101)
Exam Number:	JS-Dev-101
Available Languages:	English
Real Exam Qty:	60 (multiple choice)
Exam Duration:	105 minutes
Passing Score:	65%
Related Certifications:	Salesforce Platform Developer II Salesforce Platform Developer I
Exam Format:	Multiple Select Questions, Multiple Choice Questions
Exam Price:	$200 USD
Certificate Validity Period:	1 year (maintenance required annually in Salesforce certification program)
Recommended Training:	Salesforce Trailhead - JavaScript Developer I MDN Web Docs - JavaScript Guide
Exam Registration:	Kryterion Webassessor (Exam Delivery) Salesforce Certification Registration
Sample Questions:	Salesforce JS-Dev-101 Sample Questions
Exam Way:	Online proctored exam via Salesforce authorized testing platform (e.g., Webassessor)
Pre Condition:	No formal prerequisites, but familiarity with JavaScript and web development is recommended.
Official Syllabus URL:	https://trailhead.salesforce.com/credentials/javascriptdeveloper

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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 2	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 3	Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 4	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 5	Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy falsy evaluations.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q147-Q152):

NEW QUESTION # 147
A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript TO ensure that visitors have a goodexperience, a script named personaliseContext needs to be executed when the webpage is fully loaded (HTML content and all related files ), in order to do some custom initialization.
Which statement should be used to call personalizeWebsiteContent based onthe above business requirement?

A. document.addEventListener(''onDOMContextLoaded', personalizeWebsiteContext);
B. Document.addEventListener('''DOMContextLoaded' , personalizeWebsiteContext);
C. window.addEventListener('onload', personalizeWebsiteContext);
D. window.addEventListener('load',personalizeWebsiteContext);

Answer: D

NEW QUESTION # 148
A developer wants to use a module called DatePrettyPrint.
This module exports one default function called printDate().
How can the developer import and use printDate()?

A. import DatePrettyPrint() from '/path/DatePrettyPrint.js';
printDate();
B. import printDate from '/path/DatePrettyPrint.js';
DatePrettyPrint.printDate();
C. import printDate from '/path/DatePrettyPrint.js';
printDate();
D. import DatePrettyPrint from '/path/DatePrettyPrint.js';
DatePrettyPrint.printDate();

Answer: C

Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge ES Modules follow these rules:
Default exports are imported using:
import anyName from 'module'
The name chosen in the import does NOT need to match the exported name.
If a module exports:
export default function printDate() {}
then consuming code should import the function directly:
import printDate from '/path/DatePrettyPrint.js';
To execute it:
printDate();
Option analysis:
A incorrect:
import DatePrettyPrint() is invalid syntax.
Also calling printDate() without importing it is incorrect.
B incorrect:
A default export imported as DatePrettyPrint gives the function itself, not an object containing methods.
You cannot call DatePrettyPrint.printDate().
C incorrect:
Imports printDate but then calls DatePrettyPrint.printDate(), which does not exist.
D correct:
Correct import of a default-exported function.
Correct direct invocation.
________________________________________
JavaScript Knowledge Reference (text-only)
Default export → imported without braces.
Importing default functions gives a callable function, not an object.
Correct syntax: import identifier from "module".

NEW QUESTION # 149
Given the code:
const copy = JSON.stringify([new String('false'), new Boolean(false), undefined]); What is the value of copy?

A. '["false", {}]'
B. '["false", false, undefined]'
C. '[false, {}]'
D. '["false", false, null]'

Answer: D

Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge JSON.stringify() applies the following rules:
String objects (new String('false'))
Are converted to their primitive string values.
So:
new String("false") → "false"
Boolean objects (new Boolean(false))
Convert to their primitive boolean value:
new Boolean(false) → false
Undefined values inside arrays
According to the JSON specification, undefined becomes null when stringifying an array:
JSON.stringify([undefined]) → "[null]"
Therefore, the array becomes:
["false", false, null]
And JSON.stringify wraps it in quotes:
'["false", false, null]'
This is exactly option A.
________________________________________
JavaScript Knowledge Reference (text-only)
Object wrappers (String, Boolean) are converted to primitives during JSON serialization.
undefined becomes null inside arrays when stringified.
JSON.stringify() follows the JSON data-model rules strictly.

NEW QUESTION # 150
Given the code below:
Setcurrent URL ();
console.log('The current URL is: ' +url );
functionsetCurrentUrl() {
Url = window.location.href:
What happens when the code executes?

A. The url variable has local scope and line 02 executes correctly.
B. The url variable has global scope and line 02 executes correctly.
C. The url variable has global scope and line 02 throws an error.
D. The url variable has local scope and line 02 throws an error.

Answer: B

NEW QUESTION # 151
In which situation should a developer include a try .. catch block around their function call ?

A. The function contains scheduled code.
B. The function has an error that should not be silenced.
C. The function might raise a runtime error that needs to be handled.
D. The function results in an out of memory issue.

Answer: C

NEW QUESTION # 152
......

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