Is it possible to exchange information between different processes in the system?

Yes, information exchange between different processes is possible in Android. Mechanisms such as:

• ContentProvider — allows data sharing between applications.
• Binder — a low-level IPC mechanism on which many other components are based.
• AIDL (Android Interface Definition Language) — used to define interfaces through which processes can interact.
• BroadcastReceiver — for transmitting broadcast messages.

For example, if you have a service in one process and an activity in another, they can exchange data via AIDL or ContentProvider.