Computer Concepts Module 10 Practice Exam

What is the role of a file extension in mapping files to apps or handlers?

It defines the file's owner. It indicates the application type to use; OS maps extension to apps. It sets file permissions. It indicates network location.

Correct Answer:

It indicates the application type to use; OS maps extension to apps.

Explanation:

A file extension serves as a hint about the file’s type, so the operating system can choose the right program to open it. When you open a file, the system checks the extension (like .txt, .jpg, or .docx) and looks up which application is registered to handle that type, then launches that program by default or lets you pick one. This mapping between extensions and apps is how the OS wirelessly connects a file to its appropriate handler. Ownership, permissions, and network location are different concepts. Ownership is who owns the file; permissions control who can read or write it; and network location is about where the file is stored or retrieved from. Extensions don’t determine these aspects; they primarily guide which application should be used to work with the file.

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