The interview process began with a phone interview, followed by a full-day onsite technical interview.

During the onsite, I interviewed with two engineers from the general Google employee pool and three from the group I would be working with.

The questions focused on several areas:

• Algorithm development and whiteboard coding exercises
• Object-oriented design methodology and practice
• Dynamic systems, with specific questions relevant to the position

I also had a one-on-one lunch, which was not technical but I suspect was a behavioral interview.

Define a function that takes in the state of a Sudoku game and returns one of three states:

• Error (if the user has input an erroneous entry)
• Error-free but incomplete
• Solved