The phone interview starts directly with technical questions.
The acknowledge it involves is about an array of strings and an array of integers. Therefore, the algorithms part is simple, but the coding part is tedious, with many corner cases to consider.
The interviewer may give you some hints, but it is not guaranteed. I guess they really want people who write code every day.
The corner case is not easy to cover completely.
The following metrics were computed from 3,728 interview experiences for the Google Software Engineer role in United States.
Google's interview process for their Software Engineer roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Google's Software Engineer interview process in United States.