Bio-Data: It consists the information about the individual and his attributes, hobbiers, interests along with educational qualification to describe the person, the best.
Resume: A resume is a one or two page "summary of your skills, experience and education. Generally no more longer than a page or two. It indicates candidate's professional qualification.
CV: A curriculum vitae is a longer and more detailed synopsis. Generally over a couple of pages long. It indicates candidate's professional experience.