Cleared CKAD exam in first attempt. Thanks, @Mumshad Mannambeth, @Mohamed Ayman @Tej_Singh_Rana and everyone else here.
Perhaps spent a lot of time worrying on aliases , vimrc and all those different environments, due to which I lost time and was unable to complete it fully.
Mumshad, What a wonderful course you have made !! Lighting Labs, mock tests helped a lot to achieve in a months time.
Some additional resources for practice