Assessment Day includes 4 stages. A Behavioral Interview, a Technical Interview, a Technical/Sales Presentation and a Group Activity. The Behavioral Interview is your standard scenario interview questions, strengths, weaknesses, that sort of thing. The Technical Interview is a series of questions where one questions answers is subsequently used in the next question. I was asked about how a computer would recognize a spectrum of shades in an image. This in turn led to some psuedo-coding which led to a contrasted image wherein I had to use or reevaluate my psuedo-code. It is the point of the exercise not necessarily to know the straight answer, rather work your way through the answer by asking questions to the interviewer so that they may help you understand. The Presentation is a simple sales presentation using technical specs and showcasing your understanding for the product, how and why etc. It's fairly free-form and the other presentations differed vastly. The Group activity is simply about showcasing organizational skills and quantity/quality of solving something under pressure.