I am new to this site and extremely interested in photography. I want to know what are the basics one should know while capturing a picture, and what are the prerequisites required to learn?
Your question was a very broad. I will try my best to give a relevant answer. Try http://photography.about.com, a very informative site. Also try reading the digital photography book by Scott Kelby and also try The Photographer's Eye by Michael Freeman, both are excellent books. There are many other sites in internet relating to photography giving you excellent information, and good luck with your photography.