Questions generally were tell me about yourself, why BT, why passion for technology area, why particularly this role, what do you know about company's values, what divisions are there in the company, what is your knowledge in different platforms java,linux? BT's competitors and what do you know about them? Network related questions: List OSI model layers ,what is honeypot,security hardening? Then competency questions related to team work, and a challenge you faced? what would you do to prevent it future projects?