Yelp Software Engineer Intern interview questions

Handed in resume to recruiters at on campus job fair. Received an email within a week requesting me to send in an electronic version of my resume. Within another week, the same recruiter asked to schedule an interview with me. First round is a 30 minute phone interview consisting of trivia questions. A lot of them were the exact same ones on glassdoor. - port number for HTTP - number of bit in octal - SSL - Time complexity of adding things to Linked List - some other time complexity things She let me know right away that I had passed and that she'd contact me with more details on the second round of interviews which was an hour interview through Skype with one of the employees based in San Francisco. The second round consisted of get to know you questions, some general OOP questions, and a coding question (he sent me a link to an online compiler to code in). Then he asked me if I had questions for him, which lasted around 15 minutes. - Why Yelp? - difference between abstract classes and interface, when would you use one over the other - abstraction, polymorphism, inheritance, encapsulation - other than browser, where does cache-ing happen? Yelp is one of my first "real" tech interviews. So I have nothing to compare it with. However, I've heard that their interviews are pretty hard. I definitely was not as prepared as I could be. Yelp is big on Python (which I didn't know. I tried to code in Java but my interviewer couldn't help me much because he's not a Java programmer. However, he tried really hard to guide me through the process) so I think knowing Python will help greatly.