What is the difference between an EXE and a DLL?

Purpose:

• Acts as an idiot filter to see if person has basic comprehension of building blocks
• Left open ended for developer to illustrate prowess, any references to memory management differences would be a good sign.

Potential Answer:
DLL or Dynamic Link Libary is library of functions that is consumed by an application. They are thus loaded at runtime into memory. And exe is an out of process application meaning it has it own process and stands alone. DLL are in process..