Extremely Unprofessional. I was applying for position in ByteDances global ecommerce division. I was asked to draw a diagram of my current companies ecommerce systems and all the technologies in it. I said that I didn't actually set up those systems, and asking about how those systems worked would not reflect anything about my skillset, and that that information was proprietary. The interviewer said I was taking it the wrong way. The interviewer then asked me how my company dealt with noisy input data from some part of the system that was not even handled by my organization. I cut off the interview halfway through the coding section when it was obvious the interviewer was not prepared for anything except asking how my current company designed their system.