During the technical interview process at Google, candidates can expect to encounter coding problems that primarily range from medium to hard difficulty, as categorized on platforms like LeetCode.

The majority of these problems emphasize algorithmic thinking and efficient problem-solving techniques.

In particular, a strong understanding of graph traversal algorithms, such as Breadth-First Search (BFS) and Depth-First Search (DFS), is crucial. These paradigms are frequently used in interview problems related to:

• Trees
• Graphs
• Backtracking
• Shortest path
• Connectivity components

Given a file system structure, how can you find the size of a folder? Each item is either a folder with the IDs of the items inside it, or another type: a file with a name and size.