Free PDF Salesforce - JavaScript-Developer-I - High Hit-Rate Salesforce Certified JavaScript Developer (JS-Dev-101) Testking Exam Questions

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Salesforce Platform Integration	- Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript
Asynchronous JavaScript	- Event loop and concurrency model - Promises and async/await - Error handling in async workflows
JavaScript Language Fundamentals	- Data types, variables, and operators - ES6+ syntax and features - Functions, scope, and closures
Browser and DOM Interaction	- Event handling and propagation - DOM manipulation and traversal - Browser APIs (fetch, storage, timers)
Testing and Debugging	- Unit testing principles - Debugging techniques and tools

>> JavaScript-Developer-I Testking Exam Questions <<

Free PDF Quiz 2026 JavaScript-Developer-I: Salesforce Certified JavaScript Developer (JS-Dev-101) – Trustable Testking Exam Questions

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q102-Q107):

NEW QUESTION # 102
Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

A. undefined
B. An error
C. 'London'
D. 'NaN'

Answer: D

NEW QUESTION # 103
Given the code below:

What happens when the code executes?

A. The ur1 variable has global scope and line 02 throws an error.
B. The ur1 variables has local scope and line 02 throws an error.
C. The ur1 variable has global scope and line 02 executes correctly.
D. The ur1 variable has local scope and line 02 executes correctly.

Answer: C

NEW QUESTION # 104
Refer to the code below:

Which two function can replace line 01 and return 58 to sum? Choose 2 answers

A. const addBy = function (num1) {
Return function (num2) {
}
}
B. const addBy = (num1) num1 + num2
C. Const addby = function (num1) (
Return function (num2) (
}
}
D. const addBy = num1 (num2) => num1 + num2 ;

Answer: A,D

NEW QUESTION # 105
A developer at Universal Containers is creating their new landing page basedon HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

A. Add a handler to the personalizeWebsiteContent script tohandle the DOMContentLoaded event
B. Add a listener to the window object to handle the lead event
C. Add a listener to thewindow object to handle the DOMContentLoaded event
D. Add a handler to the personalizeWebsiteContent script to handlethe load event

Answer: B

NEW QUESTION # 106
Which option is true about the strict mode in imported modules?

A. Add the statement use strict =false; before any other statements in the module to enable
not- strict mode.
B. Imported modules are in strict mode whether you declare them as such or not.
C. Add the statement use non-strict, before any other statements in the module to enable
not-strict mode.
D. You can only reference notStrict() functions from the imported module.

Answer: D

NEW QUESTION # 107
......

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