A beginner-friendly guide explaining how to verify whether an array represents a valid Max Heap. Covers the Max Heap definition, array-based heap storage using index formulas (left child: 2i+1, right child: 2i+2), and an O(n) Java algorithm that checks only parent nodes (indices 0 to n/2-1) against their children. Also highlights common mistakes like checking all nodes instead of just non-leaf nodes and forgetting boundary checks.
Table of contents
What is a Max Heap?How is a Heap Stored in an Array?ExampleKey ObservationAlgorithmJava ImplementationComplexity AnalysisWhy This Works EfficientlyCommon Mistakes to AvoidFinal InsightSort: