Which concept encapsulates computer programs from the underlying OS on which they are executed?

• A. Metadata
• B. Emulation
• C. Application Virtualization
• D. Tag

Answer: (C)

Application virtualization isolates and encapsulates an application so it runs without being tightly tied to the underlying operating system. It packages the app’s binaries, libraries, registry settings, and other dependencies into a virtualized container. The host OS then presents a stable, consistent runtime environment to the application, regardless of differences in file paths, library versions, or system configurations on the actual OS. This decoupling makes deployment easier, reduces conflicts between applications (often called dependency or compatibility issues), and allows the same app to run across different OS versions or setups with less modification.

In contrast, metadata describes data about data, not the execution environment of programs. Emulation mimics another system or architecture, which is broader than isolating a single application from the host OS. A tag is simply a metadata label.