Google Software Engineer Interview Experience — An L4 Loop Downleveled to L3

I recently interviewed for Google L4 R1 and R2. After the interviews, I was downleveled to L3.

Round 1

Coding: Given a file system containing directories and files, where each file has a size and each directory contains files or another directory, calculate the total entity size for a given ID that may identify either a directory or a file. It was somewhat like a wrapped version of LeetCode 339.

The follow-up was to check whether it was a valid file system. I have forgotten the specific requirements, but the implementation was somewhat like LeetCode 261.

Behavioral questions: Regular behavioral questions.

Three days later, I passed and scheduled R2.

Round 2, MTV onsite

Coding 1: An object-oriented design problem for a bookshelf containing a bookmark. It needed to support CRUD operations for books and maintain the bookmark's position.

Coding 2: LeetCode 674 plus LeetCode 3738.

One week later, I was told that the feedback was positive and that my packet would be sent to the hiring committee. Another week later, I was told that the hiring committee had approved L3, and I started team matching.