Goto Largest Bucket

Problem Overview

• Core task: process "goto" and "create" commands across named buckets and return the bucket with the most files after all commands.
• Inputs/Outputs: an ordered command list; output is the bucket name; constraints: first is goto, at least one create, buckets always exist, no ties, duplicate file names in a bucket are ignored.
• Context: models a file system with storage buckets and file creation events.
• From Databricks interviews; a coding interview problem and interview question about command processing.