They asked some questions about my background such as my final project, and my control systems background. Then they gave me a series of coding problems to solve. The whole process took about an hour, They were very friendly.
Interview questions [1]
Question 1
Create a matrix size nxn and fill it with values of 0's. Then replace all but the outermost values with 1. Then create a circle that touches all sides of the matrix, and fill it with 1's instead of the square.