Sir plze tell me what the procedure and how i know the concelling exact date, time, venue. And how i choose the option or locking .

Regularly check the josaa website.If there is anything new you will be notified on home screen.You should read the brochure for key dates.Read carefully as if you are late nothing can be done about that.And if you get college in any round you have to submit the admission fee for that college and then only you will be eligible for next round councelling.
Contact me if you have further queries.