* what is jvm? why java is called "platform independent"? * what is the difference between jdk and jre? * what is the diff between == and .equals() in comparing java Strings? * what is the diff between both SOAP WS and RESTful WS? which ine is favor? * when did u use synchronized keyword in java? * diff between Runnable and Callable interfaces? * diff between thread and process * define image processing * how you monitor your java application for potential performance or memory issues? * diff between "implements Runnable" and "extends Thread" * what happens if a thread throws an Exception inside synchronized block? * what is volatile in java? * how to stop thread in java * how to create immutable object in java? * diff between StringBuffer and StringBuilder? * write code for thread-safe Singleton in java * diff between sleep and wait * explain Normalization of database * pick and write some design pattern and draw a high level diagram of him.