Four to Five rounds of interviews.
One round was based on puzzles and guesstimates.
Other rounds were based on game design and creativity, ideas for new features etc.
Playing a couple of games in detail will help.
I applied through college or university. I interviewed at Zynga (Los Angeles, CA)
Interview
Applied online and through Campus Recruitment.
The Oncampus interview was awesome. The guy was friendly, asked me in detail about my courses, expectations. Why Zynga, what I could contribute. Languages I know and how the shift form IT to Comp Sci had been.
Went ahead to a 2nd tech round phone interview, where a scary sounding person who wouldnt budge from his weird questions took the interview. Asked me to write code and then read it back to him. Very inefficient process which did not work well for either of us.
Interview questions [1]
Question 1
How do you think google finishes its search for you, as in how are prompts or suggestions generated.
I had a initial phone interview asking about my qualifications. Afterward, an in-person interview was scheduled on the Zynga campus. The interview took I believe 4 hours from 10am-2pm. They provided lunch in between. Each interview was about half an hour, and someone with your same position talked to you off the record during lunch. Some interviews were more like a conversation, while others asks a lot of situational questions.