1. Data Structures - RavikanthEragapati/Interview GitHub Wiki

Tier 1: Core & Most Frequently Used (Master These)

• Arrays/Strings
• Hash Maps/Hash Tables/Hash Sets
• Linked Lists
• Stacks & Queues

Tier 2: Frequently Encountered (Know These Well)

• Trees
  • Binary Trees
  • Binary Search Trees (BST)
  • Heaps (Priority Queues)
• Graphs

Tier 3: Specialized/Less Frequent (Familiarity is Key)

• Tries (Prefix Trees)
• Matrices (2D Arrays)
• Union-Find (Disjoint Set Union)
• B+ tree
• Bloom Filter