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It was hard, as you must have problem-solving skills and great, solid basics such as OOP, data structures, algorithms, and so on. One thing that may help you is the Codeforces website and LeetCode.

I had my phone interviews (detailed here: http://www.glassdoor.com/Interview/Google-Interview-RVW854692.htm) and did pretty well. I was a little surprised to have been called for an on-site interview. I chose the New York office for the interview, w

It takes a pretty long time. You have to go through phone interviews as well as physical interviews.