Final answer:
The operating system's extensibility refers to its inherent flexibility in permitting functional modifications to the system without disrupting service. It allows for easy addition of new features or functionalities without requiring a complete replacement or reconfiguration of the operating system.
Step-by-step explanation:
The operating system's extensibility refers to its inherent flexibility in permitting functional modifications to the system without interfering with service. This means that the operating system can be easily extended or enhanced to add new features or functionalities without disrupting its current operations.
For example, in an operating system with extensibility, developers can create and install new device drivers to support different types of hardware, such as printers or graphic cards, without requiring a complete replacement or reconfiguration of the existing operating system.
Extensibility enhances the adaptability of the operating system to the changing needs and advancements in technology.