If you struggle, it'll be a struggle everyday once you get into one of those corporations. Listen to yourself.
I think that 99% of the interview questions are overkill and don't reflect the actual demands of the job, or the metrics by which you'll be measured. If you're a hard worker, a team player, and write decent code, you'll probably be fine once you get your foot in the door.
And yes, having Google on your resume opens doors.