Medium Masterclass
DSA Interview Mastery
DSA Interview Mastery is a guided sequence designed to build your understanding step by step.
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107 Lessons
Production-Ready
Not just theory. Learn the patterns used at companies like Google, Meta, and Uber.
Interactive Progress
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Certification
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Course Curriculum
9. Recursion & Backtracking
6 Lessons01Pattern Blueprint: The Backtracking Master Template
6 min read
02Mastering Recursion: The Three Laws and the Decision Tree
5 min read
03Backtracking Pattern in Java: Permutations and Combinations
13 min read
04Problem: Permutations
6 min read
05Problem: Combination Sum
6 min read
06Recursion & Backtracking: Curated Practice Problems
5 min read
6. Stack, Queue & Monotonic Stack
6 Lessons01Pattern Blueprint: The Monotonic Stack Template
6 min read
02DSA Masterclass Module 6: Stack, Queue & Monotonic Stack
5 min read
03Problem: Valid Parentheses
6 min read
04Problem: Next Greater Element I
6 min read
05Monotonic Stack Pattern in Java: Efficiently Finding Next Greater/Smaller Elements
11 min read
06Stack & Queue: Curated Practice Problems
5 min read
4. Sliding Window Pattern
6 Lessons01Pattern Blueprint: The Universal Sliding Window Template
6 min read
02The Sliding Window Pattern: Eliminating Redundant Calculations
5 min read
03Problem: Maximum Sum Subarray of Size K
5 min read
04Problem: Longest Substring with K Distinct Characters
5 min read
05Problem: Minimum Window Substring
6 min read
06Sliding Window Pattern: Curated Practice Problems
6 min read
3. Arrays & Two Pointers Pattern
4 Lessons01Pattern Blueprint: The Two Pointers Master Template
6 min read
02The Two Pointers Pattern: Mastering Linear Array Optimizations
6 min read
03Two Sum II: Input Array Is Sorted (Two Pointers)
6 min read
04Remove Duplicates from Sorted Array (In-Place)
5 min read
10. Dynamic Programming
5 Lessons01Dynamic Programming in Java: Demystifying the 0/1 Knapsack Pattern
9 min read
02The Dynamic Programming Masterclass: Tabulation, Memoization, and State
6 min read
03Problem: Longest Increasing Subsequence
6 min read
04Problem: Coin Change
6 min read
05Dynamic Programming: Curated Practice Problems
5 min read
12. Binary Search Patterns
4 Lessons01DSA Masterclass Module 12: Binary Search Patterns
5 min read
02Binary Search Pattern in Java: Efficiently Searching Sorted Data
12 min read
03Problem: Koko Eating Bananas (Search on Answer)
6 min read
04Binary Search: Curated Practice Problems
5 min read
8. Graphs (BFS, DFS, TopoSort)
4 Lessons01The Graph Mastery Blueprint: BFS, DFS, and Representation
6 min read
02Topological Sort in Java: Handling Dependencies with Kahn's Algorithm
10 min read
03DSA Masterclass: Dijkstra’s vs. Bellman-Ford (Shortest Path Algorithms)
6 min read
04Graphs: Curated Practice Problems
5 min read
11. Greedy Algorithms
4 Lessons01DSA Masterclass Module 11: Greedy Algorithms
6 min read
02Problem: Meeting Rooms (Interval Scheduling)
5 min read
03Problem: Jump Game
5 min read
04Greedy Algorithms: Curated Practice Problems
5 min read
13. Heaps & Priority Queue
3 Lessons01DSA Masterclass Module 13: Heaps & Priority Queues
5 min read
02Problem: Kth Largest Element in an Array
6 min read
03Heaps: Curated Practice Problems
5 min read
15. Mock Interviews & Strategy
2 Lessons01DSA Masterclass Module 15: Mock Interviews & Strategy
5 min read
02Lesson: The FAANG Interview Checklist
7 min read
5. Linked List Deep Dive
4 Lessons01Linked List Deep Dive: Memory, References, and Pointers
5 min read
02Problem: Reverse a Linked List
5 min read
03Fast & Slow Pointers in Java: Detecting Cycles and Finding Middle Elements
12 min read
04Linked Lists: Curated Practice Problems
5 min read
2. Problem Solving Mindset
2 Lessons01DSA Masterclass Module 2: The Problem Solving Mindset
5 min read
02Lesson: How to Explain DSA Solutions
5 min read
1. Time & Space Complexity
4 Lessons01DSA Masterclass Module 1: Time & Space Complexity
5 min read
02Problem: Analyze Nested Loops
5 min read
03Problem: Analyze Recursive Depth
5 min read
04DSA Complexity: Curated Practice Problems
5 min read
7. Trees (BFS, DFS, LCA)
5 Lessons01The Binary Tree Masterclass: BFS, DFS, and Structural Intuition
6 min read
02Tree Traversals in Java: Mastering BFS and DFS for Coding Interviews
8 min read
03Problem: Maximum Depth of Binary Tree
5 min read
04Problem: Validate Binary Search Tree
6 min read
05Trees: Curated Practice Problems
5 min read
14. Tries & Advanced Structures
3 Lessons01DSA Masterclass Module 14: Tries & Advanced Structures
5 min read
02Trie (Prefix Tree) in Java: The Ultimate Data Structure for String Problems
8 min read
03Tries: Curated Practice Problems
5 min read
16. Bit Manipulation & Logic
1 Lessons01DSA Masterclass: The Bitmasking & XOR Blueprint
7 min read
17. Company Playbooks
2 Lessons01Company Playbook: The Google 15
6 min read
02Company Playbook: The Meta 15
6 min read
3. Arrays & Two Pointers
2 Lessons01Arrays & Two Pointers: Curated Practice Problems
5 min read
02Merge Intervals Pattern in Java: Conquer Overlapping Subarrays Efficiently
9 min read
Algorithms & Data Structures
40 Lessons01Centroid Decomposition in Java: Solving Tree Path Problems
7 min read
02Heavy-Light Decomposition in Java: Optimizing Tree Queries
5 min read
03Link-Cut Trees in Java: Dynamic Tree Connectivity
6 min read
04Suffix Automaton in Java: The Ultimate String Data Structure
5 min read
05AVL Trees: Self-Balancing Binary Search Trees
6 min read
06Kosaraju's Algorithm for Strongly Connected Components
7 min read
07Manacher's Algorithm in Java: Linear Time Palindrome Search
7 min read
08Mo's Algorithm: Offline Range Queries
6 min read
09Red-Black Trees in Java: The Engine Behind TreeMap and HashMap
5 min read
10Segment Tree Data Structure: Efficient Range Queries
6 min read
11Skip Lists in Java: The Probabilistic Alternative to Balanced Trees
5 min read
12Tarjan's Algorithm in Java: Finding Strongly Connected Components
7 min read
13Trie (Prefix Tree) Data Structure - Java Implementation and Use Cases
6 min read
14A* Search Algorithm in Java: Heuristic Pathfinding
7 min read
15B-Trees and B+ Trees in Java: The Engines of Modern Databases
7 min read
16Bellman-Ford Algorithm in Java: Shortest Paths with Negative Weights
12 min read
17Bloom Filters in Java: Probabilistic Data Structures
7 min read
18Boyer-Moore Voting Algorithm in Java: Finding the Majority Element
7 min read
19Fenwick Trees (Binary Indexed Trees) in Java
7 min read
20Floyd-Warshall Algorithm in Java: All-Pairs Shortest Paths
7 min read
21Huffman Coding in Java: Lossless Data Compression
7 min read
22Kadane's Algorithm in Java: Maximum Sum Subarray
7 min read
23Kruskal's Algorithm in Java: Finding the Minimum Spanning Tree
7 min read
24Longest Common Subsequence (LCS) in Java: Dynamic Programming Guide
7 min read
25Lowest Common Ancestor (LCA) in Java: Binary Trees and DAGs
12 min read
26LRU Cache Implementation in Java: $O(1)$ Strategy
7 min read
27Matrix Traversal in Java: Spiral, Diagonal, and Flood Fill
13 min read
28Prim's Algorithm in Java: Minimum Spanning Tree via Greedy Growth
5 min read
29Rabin-Karp Algorithm in Java: Efficient String Searching with Hashing
5 min read
30Sudoku Solver in Java: Efficient Backtracking and Pruning
11 min read
31Suffix Arrays and Suffix Trees in Java: Advanced String Structures
7 min read
32Z-Algorithm in Java: Linear Time String Matching
7 min read
33BFS (Breadth First Search) in Java: Level-Order and Shortest Path
11 min read
34DFS (Depth First Search) in Java: Tree and Graph Traversals
12 min read
35Dutch National Flag Pattern in Java: Efficient Three-Way Partitioning
9 min read
36In-place Reversal of a Linked List in Java: Efficient Memory Management
9 min read
37Monotonic Queue Pattern in Java: Efficiently Solving Sliding Window Maximum
12 min read
38Prefix Sum Pattern in Java: Efficiently Calculate Range Sums and Subarray Properties
9 min read
39Sorting Algorithms in Java: QuickSort, MergeSort, and HeapSort Explained
12 min read
40Union Find (DSU) in Java: Connectivity and Cycle Detection
10 min read
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