hi, i am presently in the last semester of my b.tech when is the right time to start preparing for civil service exam especially as i am from a science background may be it will take me a tittle more time to prepare for optional subjects. Please give advice

::No more optional paper in UPSC Civil Services prelims from 2011 onwards:: Setting the stage for civil service aspirants to be tested for their aptitude rather than their memory, the government on Monday announced the outline of the new Civil Services Aptitude Test (CSAT) and changes in the General