Goswami Ganesh Dutta S.D. College

Both the fields are good and have importance (as inter-related).
Considering job prospects I would say biotechnology comes first to bioinformatics:
Biotechnology is related to laboratory(both dry and wet lab) works which include from sample extraction, preparation and further processes and the work includes (biochemistry, molecular biology, genetics, microbiology, immunology, etc.) whereas Bioinformatics is related to dry laboratory work where you use the biotechnology samples and analyse them using the software.
Both are inter related, and the process would be biotechnological work followed by bioinformatics and also many times certain samples directly used in bioinformatic analysis.