Client-side extensions: In web application development, what do client-side extensions primarily add functionality to?

Difficulty: Easy

Correct Answer: The web browser (client)

Explanation:


Introduction / Context:
Client-side extensions enhance the user’s browser with additional capabilities. Examples include JavaScript libraries, browser plug-ins, web components, and other client-executed features that improve interactivity and presentation without server execution.



Given Data / Assumptions:

  • The code executes on the client machine inside the browser.
  • Enhancements affect rendering, interaction, or local logic.
  • No server resource is required for executing the extension code.


Concept / Approach:
Differentiate between client-side (executed by the browser) and server-side (executed on the server). Client-side extensions manipulate the DOM, handle events, and perform local computations, potentially calling APIs for data.



Step-by-Step Solution:

Identify execution environment: the browser.Match typical technologies: JavaScript, WebAssembly, browser APIs.Select the option that states “browser (client).”


Verification / Alternative check:
Developer tools show scripts running in the browser, confirming client execution.



Why Other Options Are Wrong:

  • Server OS, firewall, and network infrastructure are unrelated to client-side logic.
  • Database engines run on servers; client-side code does not extend them directly.


Common Pitfalls:
Confusing client-side extensions with server-side frameworks; mixing deployment targets.



Final Answer:
The web browser (client)

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