Excellent points by daniyalahmed. Your analysis is very objective and honest and I am glad we have such people around, it is because of people like you that this country is running despite all the problems we face on a daily basis.
CSS examination is no match for the standards, reliability and accuracy of O/A Levels or GRE examinations. There is a reason why those countries are highly advanced and appear at the top in most international rankings whereas we are most of the time at the bottom of such rankings.
What we have done is ruined an excellent system left by the British, if you look at UK Civil Service Fast Stream recruitment nowadays, it is very very different now.
Their process is as follows:
Online Application>Self-Assessed Online Numerical and Verbal Reasoning Test, Competency based Questions, E-Tray Exercise>One day Assessment Centre>People Skills Test/Role Play Scenarios.
I strongly suggest all of you to read this article, it is very important and will help us understand how UK civil service recruits people:
http://www.theguardian.com/public-le...aduate-careers