In the technical round, they started with questions based on my projects. Starting from the project, they went on to ask questions on stability like what is static margin, meaning of zero static margin, condition on CG location for static stability etc. They also asked about maximum endurance and range. I was asked to plot D vs V, Cp vs x/c for airfoil, streamlines around an airfoil, Cl vs alpha. Get your basic concepts crystal clear before the interview, they will try to confuse you to check how clear you are on the basic principles.