7eb704d1_racle__a_k_a___Duane_s_World____Senior
[Task] Abstract vs Concrete [Junior] Basic knowledge, often tries to implement abstract classes resulting in errors. [Senior] 
Understands when to prescribe abstract classes as prototypes and how to create concrete classes that may be instantiated based on the abstract classes.
Technoracle (a.k.a. "Duane's World")
Senior