I guess there are many foumIAS members here who are preparing for interview with CS or IT as their graduation stream. We could just list out topics and questions which could be asked.
As I have seen Doctors are asked questions about health sector very often, we too could be asked many questions on how this CS knowledge/work exp will help in administration etc etc.
One senior suggested me to prepare Cyber Security, Net Neutrality, e-Governance, Internet of Things etc.
Other topics which you could think of?