Many IDs work in areas where they can't share examples. Ideally, they've done some personal projects, but I run into that problem a lot. Also "homework" assignments may not be legal in some places (you can't ask someone to work for free).
Ask some basic questions:
"Formulate learning objectives for preparing for work in the morning." Be stringent about quality learning objectives; they tend to separate those who know the field from those who don't.
"From one of those objectives, write two knowledge check questions." Test questions separate the adults from the children.
"What the difference between a step and a stage? A process and a procedure?"
Get specific about the hardwired bits of instructional design.