“Why do you prefer this service over others?” becomes even more important when you’ve left some lucrative job just to move into the Services .
Questions on your birth place : historical, current -political , environmental if any’ .
Questions like this can be guessed in advance and hence prepared for.
Current issues , as nothing new, are in bulk. But , Their weightage has been increasing over years.
Lastly, there are a lot of content about Interview’s preparation on the internet. Do read through them.