Final answer:
The three abstractions for resources used in TinyOS are dedicated, virtualized, and shared.
Step-by-step explanation:
The three abstractions for resources used in TinyOS are: dedicated, virtualized, and shared.
1. Dedicated resources are exclusively allocated to a single task or process, which means the resource is not shared with any other task or process. For example, in TinyOS, a dedicated resource can be a specific timer that is only used by one task.
2. Virtualized resources are shared among multiple tasks or processes but in a controlled and isolated manner. These resources are partitioned or divided into virtual instances, allowing each task or process to have its own virtual version of the resource. An example of a virtualized resource in TinyOS could be a shared memory space.
3. Shared resources are freely accessible and usable by any task or process in the system. These resources are not dedicated to any specific task and can be used by multiple tasks simultaneously. In TinyOS, a shared resource can be a global data structure that can be accessed and modified by different tasks.