This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
It's not like that 'marker interface' does nothing? If you dig inside this 'Serializable' interface, you will come to know how does this work. There are 'writeObject' and 'readObject' kind of methods hidden behind the scene.