Recently had my phone screen with Google for L4.

Here are a few of my findings/experiences.

1. Interviewer was very friendly and polite.
2. He asked about the current role and challenges faced there.
3. Covered in depth analysis of current projects and asked a few questions about design patterns and architecture.
4. For Coding, question was similar to binary tree zig-zag level order traversal (LC Medium).

Coded up the solution, made a mistake but quickly fixed it and he seemed content with the fix.
Got the positive feedback from the recruiter and onsite rounds are scheduled.
Hoping for the best!!!