Quiz for Serialization & Deserialization

Q1: Which interface must a class implement to be serializable?

A. Cloneable B. Serializable C. Externalizable D. Readable

Q2: Which class is used to write serialized objects to a file?

A. ObjectWriter B. ObjectOutputStream C. FileWriter D. BufferedWriter

Q3: What is the purpose of the serialVersionUID?

A. It identifies the Java version B. It helps in garbage collection C. It is used during deserialization to verify the sender and receiver of a serialized object D. It prevents class loading errors

Q4: Which class is used to read serialized objects from a file?

A. ObjectInputStream B. FileReader C. BufferedReader D. Scanner

Q5: What happens if a class does not implement Serializable and you try to serialize it?

A. It throws ClassCastException B. It compiles with warnings C. It throws NotSerializableException D. It works with default values

Q6: Which modifier prevents a field from being serialized?

A. private B. static C. final D. transient

Q7: What must be present in a serializable class?

A. No-arg constructor B. static fields C. serialVersionUID D. Custom toString method

Q8: Which keyword indicates that a field should not be persisted?

A. volatile B. static C. private D. transient

Q9: Can static fields be serialized?

A. Yes B. No C. Only in Java 11+ D. Only final ones

Q10: Which method is used to write an object to an ObjectOutputStream?

A. writeData() B. save() C. writeObject() D. putObject()