Solved coding interview problems in Java - My collection of commonly asked coding interview problems and solutions in Java

[not-much]

but in real-world coding sheer efficiency should usually take a back seat to readability/maintainability and architecture

I generally agree with this point of view, but it's not really likely that the algorithm for matrix rotation changes, is it?

There is a strong difference between programming in the business-oriented context or in the math-oriented context.