Everything mentioned on Glassdoor is true. They seem to have a question bank and ask questions from there. The cutoff to qualify for the second round is very high. I was wrong to answer only 5 questions out of maybe 30-35 questions, and even then, I didn't qualify. They expect people to "mug up" the answers to all questions given here on Glassdoor. Good that I didn't clear the cutoff. In fact, after going through all the Glassdoor reviews while preparing for the interview, I was thinking just before the interview that I should cancel it and save myself the time. I don't think their selection process is intelligent or fair. How can you judge a person's potential by merely asking 30-40 questions which are already out there somewhere on the internet? If you are good at memorizing all the answers from the questions on Glassdoor, then you have a good chance to clear the cutoff and go to the next round (which, I heard from my friend, is also very easy with technical questions on C/C++/Java if you happen to be from a CS background). In short, not a good job for CS majors. I would prefer to work for some unknown SW company and do quality work than apply here again and work for them.

The Birthday Paradox.

If you don't know it, then you cannot answer the question. I read about it in a news article a day before, so I happened to know the answer.