Burkhard Keller Tree ( BK Tree )
Burkhard Keller Tree ( BK Tree ) is a DSA topic. In plain words you use it for folder on disk in a file explorer. Don’t start with a slogan — start with that picture.
Smallest example: left < root < right. Type it, run it, and say what you see. If you can do that from memory, you know Burkhard Keller Tree ( BK Tree ).
From the example next to this theory — Burkhard Keller Tree ( BK Tree ): dry-run [4, 1, 3].
Trap — unbalanced BST becoming a list. Fix that before you talk about advanced DSA.
Viva — what is Burkhard Keller Tree ( BK Tree )? Then show left < root < right. Then name the trap.
Exam tip
What is Burkhard Keller Tree ( BK Tree )? Show this: left < root < right. Trap: unbalanced BST becoming a list.