Google Intern interview questions

I had two phone interviews (45min per). All about technical question and coding problems. Including concept of OOD and algorithms. Actually, they are not very difficult, if you have solid algorithm background and can implement them correctly.

First I received an email from HR, informing me to prepare for a telephone interview; Then after about 1 week the interview came: the whole process included 4 parts, each about 30 minutes; The first two parts were relatively simple, some basic questions about Binary Tree; Then came 2 programming questions: just plain recursive code will solve them; The last interview wanted me to improve one of my solutions and I failed eventually.