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== Features == The GenServer behavior provides several key features: === Server Process === A GenServer is implemented as a separate process, allowing for isolation and fault tolerance. It is typically used to manage a specific piece of state and perform operations on that state. === State and Callbacks === A GenServer holds its state internally and provides a set of callbacks that define its behavior. These callbacks, such as `init/1`, `handle_call/3`, and `handle_cast/2`, allow developers to define how the server interacts with its state and handles incoming messages. === Message Passing === GenServers communicate with each other and external processes by sending and receiving messages. The `call/2` and `cast/2` functions are used to send synchronous and asynchronous messages, respectively. === Supervision === GenServers can be supervised by a supervision tree, allowing for automatic restarts and fault tolerance. This ensures that the system remains responsive even in the presence of failures.
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