Explain multithread programming and associated protection of data using a very simple example. Let's say there is a worn down bridge on a river in a remote village. It allows three cars to pass on one direction only at a time. If more than three cars are on the bridge it will break down. Can you write appropriate design for this problem? What are the factors to consider? If you are familiar with an object-oriented language (Java ), can you write class definition? Just the definition, not the implementation. You should show all private and public data members and all functions.