(1) Introduce yourself.
(2) Tell me something about a project which is very fond to you. Need not be subject-related or even engineering-related; might be from school-days.
(3) What is your weakness? What are your thoughts on personal development?
(4) If I ask you to improve on soft skills, what will you choose and why?
(5) Name the forces acting on an in-flight aeroplane.
(6) What is the difference between Center of Pressure, Center of Mass, and Center of Gravity?
A few others were only probed, in-depth, on their graduate projects (or internships). Yet, another was asked to solve two complex Aerodynamics sums. Two were asked from a variety of puzzles (see Geeks for Geeks). Nobody was asked anything pertaining to the role (or Operation Management).
Variable interview pattern - often, the technical interview has an HR flavor.