The technical tests asked algorithm-focused questions and covered many tricky corner cases in the syntactical details of the Java programming language.

I was surprised the interview process took so long; it was just over two months from start to finish before I finally received an offer.

In between, I had:

• Five phone interviews
• Six on-site technical interviews
• A drug test
• A full background screening from an independent company
• A personality test conducted by four senior project managers

Towards the end, I grew tired of the process and was tempted to withdraw my application. However, the position was very convenient due to its short commute. Unfortunately, I ended up moving later due to external circumstances, but that's beside the point.

It was a really long process; they certainly left no stone unturned.

Plot a 10x10 matrix and, without using any additional Java library functions or built-in data structures, rotate the matrix by 90 degrees.