The interview at Google involved a strong focus on data structures and algorithms, particularly tree-based problems.

One of the key questions asked was from the topic of trees, which I had practiced thoroughly using SDE sheets and video explanations.

The approach involved understanding the logic, writing pseudocode, and then implementing the solution.

The overall difficulty level of the questions ranged from easy to medium, aligning with what I had heard from others about Google interviews.

The preparation strategy of combining guided practice with previously asked questions proved to be effective.

Given a binary tree, write a function to determine the minimum depth from the root to the nearest leaf node.