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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q104-Q109):

NEW QUESTION # 104
A developer is leading the creation of a new browser application that will serve a single page application. The team wants to use a new web framework Minimalsit.js. The Lead developer wants to advocate for a more seasoned web framework that already has a community around it.
Which two frameworks should the lead developer advocate for?
Choose 2 answers

A. Vue
B. Angular
C. Express
D. Koa

Answer: B,C

NEW QUESTION # 105
Which code statement below correctly persists an objects in local Storage ?

A. const setLocalStorage = ( jsObject) => {
window.localStorage.setItem(jsObject);
}
B. const setLocalStorage = ( jsObject) => {
window.localStorage.connectObject(jsObject));
}
C. const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.persist(storageKey, jsObject);
}
D. const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.setItem(storageKey, JSON.stringify(jsObject));
}

Answer: D

NEW QUESTION # 106
Refer to the code below:

Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?

A. 0
B. 1
C. 2
D. 3

Answer: C

NEW QUESTION # 107
Which statement accurately describes the behaviour of the async/ await keyworks ?

A. Theassociated function can only be called via asynchronous methods
B. The associated class contains some asynchronous functions.
C. The associated function will always return a promise
D. The associated sometimes returns a promise.

Answer: D

NEW QUESTION # 108
Universal Containers recently launched its new landing page to host a crowd-funding campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

A. Use the DOM inspector to remove all the elements containing the class ad-library-item.
B. Use the browser console to execute a script that prevents the load event to be fired.
C. Use the browser to execute a script that removes all the element containing the class ad-library-item.
D. Use the DOM inspector to prevent the load event to be fired.

Answer: C

NEW QUESTION # 109
......

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