What does Java serialization do?

What does Java serialization do?

• A. It reads input from the console.
• B. It converts an object graph into a sequence of bytes for storage or transmission.
• C. It allows multithreading in Java.
• D. It encrypts data using a cipher.

Answer: (B)

Serialization is the process of turning an object graph into a sequence of bytes that can be stored or transmitted. In Java, a class must implement Serializable to participate, and the runtime turns the object’s state into a byte stream so it can be reconstructed later through deserialization. This is useful for saving objects to disk, sending them over a network, or caching results. The other options describe reading input, multithreading, or encryption—different concerns that don’t convert objects into a byte stream.

Serialization is the process of turning an object graph into a sequence of bytes that can be stored or transmitted. In Java, a class must implement Serializable to participate, and the runtime turns the object’s state into a byte stream so it can be reconstructed later through deserialization. This is useful for saving objects to disk, sending them over a network, or caching results. The other options describe reading input, multithreading, or encryption—different concerns that don’t convert objects into a byte stream.