Good web site for technical preparation :

http://placementsindia.blogspot.com/

Data structure related questions :

http://targetgoogle.blogspot.com/search/label/data%20structures

C puzzles
http://targetgoogle.blogspot.com/search/label/answers%20to%20programming%20interview%20questions

Good web site for C programming

http://www.gowrikumar.com/

for techies go for this website

http://www.techinterviews.com/?p=283#comment-161126

C++ Quaries
http://prashanth-cpp.blogspot.com