I got a call from recruiter after I applied on Yelp. She asked me easy technical questions (same as what others posted) like What's a HTTP GET/POST? How many bits in a short? What's a static variable? What is SSL? etc. Then I had to do a programming assignment which was easier to do for me in Perl. I sent it alongwith my full unit-tests. I got another phone screen then, in which I was asked more operating system questions for e.g. Difference between a process and a thread? What are the different synchronization mechanisms? Difference between semaphore and mutex etc. I passed this one too. Then, I got another round of technical phone screen where he started asking me questions on inheritance (and I don't know C++). This is where they told me that they can't proceed with me. But, I liked everyone's attitude. They were quite nice and professional.