Hi! First of all, you shouldn't worry too much about this 1st round interview. Being nice, smily, relaxed is half the job of making it to the next step. The other half of the job is thinking on your feet! You need to react quickly to very simple questions. Make sure you do understand what you are asked. If you don't understand what kind of answer the consultant wants, just ask him/her!The case studies, I think, are general and not related to the competency you applied to. However, as Deloitte often focuses on technology issues, you will certainly get a case study on a project that involves some technical issues. But be reassured, you do not need to have ANY technology knowledge! It's just to see if you understand how it can help in some projects.Last advice: try to read each question at the end of the case study before meeting the consultant, even if you have not enough time to answer them all on your written paper.Good Luck!