Go iOS. =)
While I never worked at Google there are some things that are really helpful.
I was able to get through interviews and work at both Apple and Microsoft based on talking through interesting passion projects that I worked on. (Graphics library on Game Boy Advance, Ray Tracer in C++, bloopers … the Apple manager really enjoyed my bloopers and outtakes from mistakes in my ray tracer)
- Talk about your passion projects (can you bring any demo’s with you?)
- Get sleep
- Spend time preparing for the interview (Review code, play with code, do something fun)
- Take notes when you’re there
Also, check out Austin’s interview tips (Cultivated Culture) … he’s a Microsoft employee who has ton of interviews and research with top performers at big name companies.
And don’t stress if you don’t get it, you’ll learn from going through the process… just keep applying.