In short
A hierarchical data structure of nodes with parent-child relationships — binary trees and BSTs are a huge, recurring category in interviews.
How to learn this
- 1Implement tree traversals: inorder, preorder, postorder, and level-order (BFS).
- 2Solve classic problems: max depth, validate a BST, lowest common ancestor.
- 3Practice both recursive and iterative traversal implementations.
More topics at this stop
Stuck on this topic? Ask an Insider
Get 1:1 guidance from people who've walked this exact path — on the InsideEdge app.
