I like to ask questions that involve implementing some small bit of logic on top of a tree or graph data structure. Like the linked list questions, these questi

I like to ask questions that involve implementing some small bit of logic on top of a tree or graph data structure. Like the linked list questions, these questions aren't as much testing problem solving or data structures as they are testing whether you've recognized the trees/graphs in the data you worked with recently || you remember working with those data structures from college (which side of the || you fall on depends on your experience level). They're a "can you code" question with a little bit of abstract thinking thrown in.