Serialization is the process of writing the state of an object to a byte stream. Deserialization is the process of restoring these objects.

Serialization is the process of converting an object into a stream of bytes, allowing the object to be easily saved to a file, sent over a network, or stored in a database. The primary purpose of serialization is to persist the state of an object. In Java, the java.io.Serializable interface is used to indicate that a class can be serialized. Objects of a serializable class can be converted into a byte stream using object output streams.

Deserialization, on the other hand, is the process of reconstructing the object from the serialized byte stream. It involves reading the byte stream and creating an object with the same state as the original object. The class of the object being deserialized must implement the java.io.Serializable interface for the deserialization process to work properly.

In summary, serialization is the process of converting an object into a byte stream, while deserialization is the process of reconstructing the object from the byte stream. These processes are commonly used for data storage, network communication, and other scenarios where object state needs to be persisted and transmitted.