BestsellerIntermediate

DSA Interview Mastery

Patterns, mental models, and interview-grade execution in one path.

A structured algorithm curriculum spanning theory, patterns, and guided problem solving so practice feels cumulative instead of random.

107 lessons•19 modules•721 min

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Designed for

Engineers targeting product-company interviews with high algorithmic rigor.

What you unlock

Pattern-first mastery across arrays, trees, graphs, DP, and greedy problems
A clean progression from theory to representative interview questions
Better verbal explanations and solution-structuring under pressure

Curriculum Map

A structured path that feels worth paying for

Every module is ordered to build confidence, not just collect content. Start with the right fundamentals, deepen into the mechanics, then pressure-test your thinking with realistic engineering trade-offs.

Module 1

1. Time & Space Complexity

4 lessons•20 min

DSA Masterclass Module 1: Time & Space Complexity

Easy • 5 min read

Problem: Analyze Nested Loops

Easy • 5 min read

Problem: Analyze Recursive Depth

Easy • 5 min read

DSA Complexity: Curated Practice Problems

Easy • 5 min read

Module 2

2. Problem Solving Mindset

2 lessons•10 min

DSA Masterclass Module 2: The Problem Solving Mindset

Easy • 5 min read

Lesson: How to Explain DSA Solutions

Easy • 5 min read

Module 3

3. Arrays & Two Pointers Pattern

4 lessons•23 min

Pattern Blueprint: The Two Pointers Master Template

Medium • 6 min read

The Two Pointers Pattern: Mastering Linear Array Optimizations

Medium • 6 min read

Two Sum II: Input Array Is Sorted (Two Pointers)

Easy • 6 min read

Remove Duplicates from Sorted Array (In-Place)

Easy • 5 min read

Module 4

3. Arrays & Two Pointers

2 lessons•14 min

Arrays & Two Pointers: Curated Practice Problems

Medium • 5 min read

Merge Intervals Pattern in Java: Conquer Overlapping Subarrays Efficiently

Medium • 9 min read

Module 5

4. Sliding Window Pattern

6 lessons•33 min

Pattern Blueprint: The Universal Sliding Window Template

Medium • 6 min read

The Sliding Window Pattern: Eliminating Redundant Calculations

Medium • 5 min read

Problem: Maximum Sum Subarray of Size K

Easy • 5 min read

Problem: Longest Substring with K Distinct Characters

Medium • 5 min read

Problem: Minimum Window Substring

Hard • 6 min read

Sliding Window Pattern: Curated Practice Problems

Medium • 6 min read

Module 6

5. Linked List Deep Dive

4 lessons•27 min

Linked List Deep Dive: Memory, References, and Pointers

Medium • 5 min read

Problem: Reverse a Linked List

Easy • 5 min read

Fast & Slow Pointers in Java: Detecting Cycles and Finding Middle Elements

Medium • 12 min read

Linked Lists: Curated Practice Problems

Medium • 5 min read

Module 7

6. Stack, Queue & Monotonic Stack

6 lessons•39 min

Pattern Blueprint: The Monotonic Stack Template

Medium • 6 min read

DSA Masterclass Module 6: Stack, Queue & Monotonic Stack

Easy • 5 min read

Problem: Valid Parentheses

Easy • 6 min read

Problem: Next Greater Element I

Medium • 6 min read

Monotonic Stack Pattern in Java: Efficiently Finding Next Greater/Smaller Elements

Medium • 11 min read

Stack & Queue: Curated Practice Problems

Medium • 5 min read

Module 8

7. Trees (BFS, DFS, LCA)

5 lessons•30 min

The Binary Tree Masterclass: BFS, DFS, and Structural Intuition

Medium • 6 min read

Tree Traversals in Java: Mastering BFS and DFS for Coding Interviews

Easy • 8 min read

Problem: Maximum Depth of Binary Tree

Easy • 5 min read

Problem: Validate Binary Search Tree

Medium • 6 min read

Trees: Curated Practice Problems

Medium • 5 min read

Module 9

8. Graphs (BFS, DFS, TopoSort)

4 lessons•27 min

The Graph Mastery Blueprint: BFS, DFS, and Representation

Medium • 6 min read

Topological Sort in Java: Handling Dependencies with Kahn's Algorithm

Medium • 10 min read

DSA Masterclass: Dijkstra’s vs. Bellman-Ford (Shortest Path Algorithms)

Hard • 6 min read

Graphs: Curated Practice Problems

Medium • 5 min read

Module 10

9. Recursion & Backtracking

6 lessons•41 min

Pattern Blueprint: The Backtracking Master Template

Medium • 6 min read

Mastering Recursion: The Three Laws and the Decision Tree

Medium • 5 min read

Backtracking Pattern in Java: Permutations and Combinations

Medium • 13 min read

Problem: Permutations

Medium • 6 min read

Problem: Combination Sum

Medium • 6 min read

Recursion & Backtracking: Curated Practice Problems

Medium • 5 min read

Module 11

10. Dynamic Programming

5 lessons•32 min

Dynamic Programming in Java: Demystifying the 0/1 Knapsack Pattern

Hard • 9 min read

The Dynamic Programming Masterclass: Tabulation, Memoization, and State

Hard • 6 min read

Problem: Longest Increasing Subsequence

Medium • 6 min read

Problem: Coin Change

Medium • 6 min read

Dynamic Programming: Curated Practice Problems

Medium • 5 min read

Module 12

11. Greedy Algorithms

4 lessons•21 min

DSA Masterclass Module 11: Greedy Algorithms

Medium • 6 min read

Problem: Meeting Rooms (Interval Scheduling)

Easy • 5 min read

Problem: Jump Game

Medium • 5 min read

Greedy Algorithms: Curated Practice Problems

Medium • 5 min read

Module 13

12. Binary Search Patterns

4 lessons•28 min

DSA Masterclass Module 12: Binary Search Patterns

Easy • 5 min read

Binary Search Pattern in Java: Efficiently Searching Sorted Data

Easy • 12 min read

Problem: Koko Eating Bananas (Search on Answer)

Medium • 6 min read

Binary Search: Curated Practice Problems

Medium • 5 min read

Module 14

13. Heaps & Priority Queue

3 lessons•16 min

DSA Masterclass Module 13: Heaps & Priority Queues

Medium • 5 min read

Problem: Kth Largest Element in an Array

Medium • 6 min read

Heaps: Curated Practice Problems

Medium • 5 min read

Module 15

14. Tries & Advanced Structures

3 lessons•18 min

DSA Masterclass Module 14: Tries & Advanced Structures

Hard • 5 min read

Trie (Prefix Tree) in Java: The Ultimate Data Structure for String Problems

Hard • 8 min read

Tries: Curated Practice Problems

Hard • 5 min read

Module 16

15. Mock Interviews & Strategy

2 lessons•12 min

DSA Masterclass Module 15: Mock Interviews & Strategy

Easy • 5 min read

Lesson: The FAANG Interview Checklist

Easy • 7 min read

Module 17

16. Bit Manipulation & Logic

1 lessons•7 min

DSA Masterclass: The Bitmasking & XOR Blueprint

Hard • 7 min read

Module 18

17. Company Playbooks

2 lessons•12 min

Company Playbook: The Google 15

Hard • 6 min read

Company Playbook: The Meta 15

Hard • 6 min read

Module 19

Algorithms & Data Structures

40 lessons•311 min

Centroid Decomposition in Java: Solving Tree Path Problems

Medium • 7 min read

Heavy-Light Decomposition in Java: Optimizing Tree Queries

Hard • 5 min read

Link-Cut Trees in Java: Dynamic Tree Connectivity

Hard • 6 min read

Suffix Automaton in Java: The Ultimate String Data Structure

Medium • 5 min read

AVL Trees: Self-Balancing Binary Search Trees

Medium • 6 min read

Kosaraju's Algorithm for Strongly Connected Components

Hard • 7 min read

Manacher's Algorithm in Java: Linear Time Palindrome Search

Medium • 7 min read

Mo's Algorithm: Offline Range Queries

Hard • 6 min read

Red-Black Trees in Java: The Engine Behind TreeMap and HashMap

Medium • 5 min read

Segment Tree Data Structure: Efficient Range Queries

Medium • 6 min read

Skip Lists in Java: The Probabilistic Alternative to Balanced Trees

Medium • 5 min read

Tarjan's Algorithm in Java: Finding Strongly Connected Components

Medium • 7 min read

Trie (Prefix Tree) Data Structure - Java Implementation and Use Cases

Medium • 6 min read

A* Search Algorithm in Java: Heuristic Pathfinding

Easy • 7 min read

B-Trees and B+ Trees in Java: The Engines of Modern Databases

Hard • 7 min read

Bellman-Ford Algorithm in Java: Shortest Paths with Negative Weights

Medium • 12 min read

Bloom Filters in Java: Probabilistic Data Structures

Medium • 7 min read

Boyer-Moore Voting Algorithm in Java: Finding the Majority Element

Medium • 7 min read

Fenwick Trees (Binary Indexed Trees) in Java

Medium • 7 min read

Floyd-Warshall Algorithm in Java: All-Pairs Shortest Paths

Medium • 7 min read

Huffman Coding in Java: Lossless Data Compression

Hard • 7 min read

Kadane's Algorithm in Java: Maximum Sum Subarray

Medium • 7 min read

Kruskal's Algorithm in Java: Finding the Minimum Spanning Tree

Easy • 7 min read

Longest Common Subsequence (LCS) in Java: Dynamic Programming Guide

Easy • 7 min read

Lowest Common Ancestor (LCA) in Java: Binary Trees and DAGs

Hard • 12 min read

LRU Cache Implementation in Java: $O(1)$ Strategy

Medium • 7 min read

Matrix Traversal in Java: Spiral, Diagonal, and Flood Fill

Medium • 13 min read

Prim's Algorithm in Java: Minimum Spanning Tree via Greedy Growth

Medium • 5 min read

Rabin-Karp Algorithm in Java: Efficient String Searching with Hashing

Medium • 5 min read

Sudoku Solver in Java: Efficient Backtracking and Pruning

Medium • 11 min read

Suffix Arrays and Suffix Trees in Java: Advanced String Structures

Hard • 7 min read

Z-Algorithm in Java: Linear Time String Matching

Hard • 7 min read

BFS (Breadth First Search) in Java: Level-Order and Shortest Path

Medium • 11 min read

DFS (Depth First Search) in Java: Tree and Graph Traversals

Medium • 12 min read

Dutch National Flag Pattern in Java: Efficient Three-Way Partitioning

Medium • 9 min read

In-place Reversal of a Linked List in Java: Efficient Memory Management

Medium • 9 min read

Monotonic Queue Pattern in Java: Efficiently Solving Sliding Window Maximum

Medium • 12 min read

Prefix Sum Pattern in Java: Efficiently Calculate Range Sums and Subarray Properties

Medium • 9 min read

Sorting Algorithms in Java: QuickSort, MergeSort, and HeapSort Explained

Medium • 12 min read

Union Find (DSU) in Java: Connectivity and Cycle Detection

Medium • 10 min read