What is the role of the data transformation process from serialization format back into an object in applications?

The process of converting data from a serialized format back into an object is called deserialization. Its role in applications is to restore objects from a saved or transmitted format (such as JSON, XML, binary format) for further processing within the program. This is important when data is transmitted over a network, stored in files or databases, as serialized data is just text or bytes, whereas application logic requires full objects with methods and state.

Example in Python with JSON:

import json

json_data = '{"name": "Ivan", "age": 30}'
obj = json.loads(json_data)  # deserialization from JSON to Python dictionary
print(obj['name'])  # Ivan

Thus, deserialization allows converting data into a convenient format for use within the application.