Onsite interview @ baidu - first round

It surprised me when i got a phonecall from baidu last night. And the caller surprised me again when i asked him if i should brought something to the interview, becuase his answer was, a pen.

I had a little trouble with finding the place, i went into the wrong building, but still get there in time. The interviewer is nice, but the questions are tough, they suck... He started with a regular one - how to remove duplicate data, while size of data is quite huge. I came up with about 3 kinds of solution, and he agreed with one of them that he expected. Then he asked me to introduce about my project experience, it went well too. Then came the disgusting parts, he asked a lot about c++, network, multi-process, i didnt feel comfortable about these questions because they are too detailed, and related experience required, and most importantly, i know little about them. Interviewers of Google mainly focus on solving problem ability, while interviewers of Baidu focus on technical detail, that makes me consider Baidu interview unprofessional. I couldnt answer about third of questions and feel not terrible, because i feel Baidu is terrible. At last the interviewer told me I will be informed in 1 or 2 weeks, and there will be at most 3 round interviews. Whatever, i guess i can pass, if i fail, it's Baidu's fault and loss.