i had 2 interviews, first one was with the team leader and a senior dev, they asked me about my last job, what i did, and i even drew a design for the old system i worked on, and asked me a design question. second time i was with the R&D director, he asked a python question, given an air conditioer, a remote, a temp sensor and a controller pc, the pc can turn off and on the air conditioner using the controller, and choose the desired temp on the remote, the sensor gives you current room temp, you are asked to use some API to make sure you keep the air conditioner in delta temp of "1" from the remote control desired temp, and you can only turn on and off the air conditioner, the air conditioner can only cool down the room