Tripadvisor Software Developer interview questions

The company recruiter contacted me after I handed in my resume at a university job fair. We scheduled a Skype interview with a software engineer. At first, the engineer asked me to describe my former projects. Then he asked a couple of technical questions. 1. What data structure would you use to store large amounts of phone numbers? 2. Given a very large text file, how would you extract all phone numbers from the text? 3. How would you process the text file using a parallel architecture? Finally, the engineer had given me an opportunity to ask any questions about the company. The interview ended after about 35 minutes of talking. After about 2 weeks I reveived an email explaining they will not continue with my application. The recruiter, as well as the engineer, were both very nice and helpful. However, I have never heard any feedback from either of them regarding why I am not the right fit for their company. Also, they were not interested in anything else but strictly my technical knowledge about data structures and parallel computing.

I submit my resume on University Job Fair. It took 2 weeks and I got a email to set up a skype interview, the interview took 1 hours. A friendly engineer asked my projects detail in University. And a question like how to collect a phone number in a text file. and some question about time complexity.