Java FPT Software (Fsoft) Academy Practice Test

Serialization is the process of turning a Java object into a sequence of bytes so it can be saved to a file and later reconstructed. ObjectOutputStream is designed for this purpose: it writes the state of a Serializable object to an OutputStream, using methods like writeObject. When you pair it with a FileOutputStream, you can save the serialized object to a file. Other streams shown in the options write raw bytes (FileOutputStream, BufferedOutputStream) or human-readable text (PrintWriter), not the object’s full state, so they aren’t suitable for persisting objects. Remember that the class of the object must implement Serializable; otherwise an exception is raised during writing. In practice, you’d do something like new ObjectOutputStream(new FileOutputStream("data.ser")) and call writeObject(yourObject) before closing.