Quiz Yourself: Using Core Functional Interfaces: Consumer (Advanced)

The consumer interface can be confusing, even for advanced coders.

Quiz Yourself: Using Core Functional Interfaces: Predicate (Advanced)

Predicate interfaces can be complicated, so be careful when working out the results.

Quiz Yourself: Lambda Types (Advanced)

Can a lambda return a lambda?

Quiz Yourself: Two-Dimensional Arrays (Intermediate)

Using var with two-dimensional arrays requires careful attention.