I am speaking from personal experience here, they don't count a lot of factors while rejecting a candidate, you make one mistake on their particular set of questions, you are out. They don't even look at your resumes until all your 4 interviews are completed. However, selecting a candidate is a different matter, in that decision they might consider everything.
Does your personal experience include actually being involved in the hiring process at Google?
Because in my personal experience - as both an interviewer and a hiring committee member - what you said is completely wrong.
> they don't count a lot of factors while rejecting a candidate, you make one
> mistake on their particular set of questions, you are out.
Completely false. I have personally seen many people get hired despite doing poorly in an interview or making mistakes.
The hiring committee looks at all of the available information - resume, recommendations, and interview feedback when making a decision. There is no "one-thing" that will make or break a candidate.
> They don't even look at your resumes until all your 4 interviews are completed
I have no idea where you are getting this from. All interviewers receive the candidate's resume prior to the interview. I always review the resume's to get a sense of what the candidate has done so I can ask appropriate questions.
Yes, I was interviewed at Google last year. This was basically what happened. Sure, they have your resume, I am not sure if they read it throughly, the interviewer didn't even know my major until I told him at the end of the interview. While, they don't stop inteview and say you made mistake, it's competitive and it's not possible to hire you. But, you know at that moment that you are not getting hired. I guess, they need plenty of reasons to hire a candidate, but just one reason to reject. I am not complaining, it seems to work for Google very well.