Yes I totally understand but I think the nature of the problems to solve in Java are not related with this complex algorithms. I mean, I have been training myself in generics, OOP, SOLID principles, Clean Code, Design Patterns, TDD, BDD and some others for the last three years.

How I am supposed to show my skills in one hour resolving a low level algorithm in a web IDE (this particular case)? All my "low level thinking" is pretty oxidized.

Maybe I am just wrong. A novel speaking.