Running median (moving median)problem is a well known coding problem. In that you are given with stream of integers(random, unsorted) coming one after another, you have to calculate the median of current received set of integers.
Variable passing is one of the most basic section to know when learning Java. But even without knowing this properly, you can still write Java programs that works. Yet, understanding this can make your life easy and it will make sure your code works as expected.
Mutual SSL is where client and server both have to authenticate themselves to others. In this example I will be connecting WSO2 EI/ESB with an Axis2 backend server where EI/ESB will act as the client.