Google Quantitative Compensation Analyst interview questions

I had 3 phone interviews and an Excel exercise. Overall, I thought the whole interview process was cold, awkward, and misleading. The first phone interview with the recruiter was fairly routine. Go through my resume, talk about my background, why I want to work at Google, current salary, etc. The second and third phone interviews were technical screens. The second phone interview consisted of technical questions including SQL joins and talking about some research I did for school. Before the third phone interview, I was instructed to do an Excel exercise that would be discussed in my third phone interview. The third phone interview consisted of more technical questions and brain teasers, but no mention or discussion of the Excel exercise. Thus, I felt mislead as I prepared for this instead of going over brain teasers. The recruiter also said to go over Googles products, business model, and proxy statement which were never discussed in either of the technical phone interviews.