A Design Challenge is a type of test that you might be given by a potential employer as part of the hiring process. It is meant to demonstrate to the employer your ability to work quickly, follow directions, ask questions at the time of receiving the challenge and produce a good design solution within a rather short turn around time. A challenge of this type may ask you to produce many different kinds of design deliverables. You might be asked to produce a working prototype of an App. as one example of a Design Challenge.