Google Intern interview questions

I applied for an internship at Google. I sent my CV and I got a response in 1 week. The process consisted in 2 skype interviews. The questions weren't very difficult. They want to check your problem solving skills and your ability of having the solutions done in the most efficient way.

The Interview Process was standard 2 rounds and project matching. The HR mailed me for the slots and I gave her my dates. Then after 1 week there was the first interview that went well and then after that there was the 2nd second in which I didnt very well