Interview is not that formal. Circuits were shown and you have to answer or solve for some unknowns. The interviewer will ask you how many minutes would it take you to solve for the circuit and he/she will give you "that time" to answer.

Two stages interview. Multiple interviewers from the same team. Salary on the other side was low. The tram looks young though with very focused HW experience. The interviewer were taking turns on asking questions