This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi, From last few weeks i working on online exam problem.. rest of the things are all ok.. but i m sufferring with a big problem.. i m creating a session for each user and it's working fine.. At the end i invalidating a session for that user and i m inserting his marks into database... upto this is very fine.. next time when i again start the exam the first question is always the old one and if i click on next question (Without refreshing )i get NullPointerException prbably because of the previous exam object has been invalidated. i m creating Exam object in doGet method .. and further processing is in but at the first question if i refreshed program works smoothly so i think this might be a problem of cache memory .. can anybody please help me??? i m using resin server... Bhupendra