I applied through my university for a position at Google in Ireland. Nir Belsky from the Google office in Ireland contacted me and asked me to reapply online for the Adwords account strategist position. About a week after I had applied a recruiter contacted me via email with a few more questions such as "Why do you think you are suitable for this position" after I had responded there was an interview date set up. The questions we pretty straight forward. Personally it was my first interview and I was way too stressed. I would recommend learning Adwords very well, getting a good night's sleep and not let your nerves get to you!