Find Departments with More Than 2 Employees Using GROUP BY & HAVING

Get the Count of Employees in Each Department | Interview Question

Get Maximum Salary for Each Department | Interview Question

Delete Duplicate Records but Keep First Occurrence | Multiple Approaches

Find Duplicate Records in a Table | Multiple Approaches

Find the Nth Highest Salary | Multiple Approaches Explained

2nd Highest Salary Problem Solved (4 Approaches) SQL Coding Interview

Runtime Polymorphism in C++ | Function Overriding & Virtual Functions Explained with Examples

Operator Overloading in C++ | Definition, Key Points & Coding Examples

Polymorphism in C++ | Compile Time vs Runtime | Method Overloading Explained with Examples

Abstraction in C++ | Pure Virtual Functions, Abstract Classes & Interfaces Explained

Friend Keyword in C++ | friend Function & Class Explained with Coding + Interview Q&A

Static Keyword in C++ | Static Variables & Functions Explained with Code

Inheritance in C++ | Types, Virtual Inheritance, Diamond Problem & Interview Questions

OOPs in C++ Explained with Code | Constructor, Destructor, Deep & Shallow Copy

Encapsulation in C++ | Access Modifiers, Getters & Setters Explained | OOPs Concepts + Interview Q&A

✅ OOPs in C++ | Classes & Objects | Member Variables & Functions with Hands‑On Examples

Insert Delete GetRandom in O(1) | HashMap + Vector | Leetcode 380 | C++

Group Anagrams | HashMap + Sorting | Leetcode 49 | C++ Explained

Unordered Map in C++ | STL Unordered_map Tutorial | Insert, Find, Erase

Design HashSet | Implement HashSet from Scratch | C++ | Leetcode 705

Design HashMap | Implement HashMap from Scratch | C++ | Leetcode 706

Hashing Introduction | Data Structures Basics | HashMap & HashSet Explained

Sliding Window Maximum | Deque Optimized Approach | Leetcode 239 | C++

Min Stack | Track Minimum in O(1) | Leetcode | C++ Solution Explained

Implement Queue using Stacks | Two Stack Approaches | Leetcode | C++

Implement Stack using Queues | Two Queues Approach | Leetcode | C++

Trapping Rain Water II | Min Heap + BFS | C++ | Leetcode Solution Explained

Reorganize String | Greedy + Max Heap | C++ | Leetcode Solution Explained

Minimum Cost to Connect Ropes | Greedy + Min Heap | C++ | GFG Solution

Smallest Range Covering Elements from K Lists | Min Heap | C++ | Leetcode Solution

K Closest Points to Origin | Min Heap | C++ | Leetcode Solution Explained

Top K Frequent Elements | Heap & HashMap | C++ | Leetcode Solution Explained

Kth Smallest Element in a Sorted Matrix | Min Heap & Binary Search | C++ | Leetcode Solution

Kth Largest Element in a Stream | Min Heap | C++ | Leetcode Solution Explained

Kth Largest Element in an Array | Min Heap Approach | C++ | Leetcode Solution

Priority Queue in C++ | STL, Custom Comparator, Min & Max Heap | Full Tutorial + GFG Code

Heap Data Structure in C++ | Full Tutorial + Applications + Heap Sort + GFG Code | DSA

Find All Strongly Connected Components | Extended Kosaraju’s Algorithm | C++ Code

Kosaraju’s Algorithm | Find Strongly Connected Components | GFG Code in C++

Strongly Connected Components (SCC) | Graph Theory Explained with Examples

M-Coloring Problem | Graph Coloring Using Backtracking | GFG Code in C++

Kruskal’s Algorithm | Minimum Spanning Tree (MST) | GFG Code in C++

Prim’s Algorithm - Minimum Spanning Tree (MST) | Graph Playlist | Leetcode C++ Solution

Floyd-Warshall Algorithm | All Pairs Shortest Path | GFG Code in C++

Dijkstra’s Algorithm | Single Source Shortest Path | Graph GFG Code in C++

Kahn’s Algorithm for Topological Sort | BFS Approach | C++ Code & Explanation.

Topological Sort in Graph | Detailed Explanation & C++ Code | Graph Theory

Satisfiability of Equality Equations | Union-Find Algorithm | Leetcode C++ Solution

Redundant Connection in Graph | Union-Find Algorithm | Leetcode C++ Solution

Union Find (Disjoint Set) with & without Rank | C++ Code | Graph Theory

Longest Cycle in a Graph | Cycle Detection in Directed Graph | LeetCode C++

Find Eventual Safe States | Cycle Detection in Directed Graph | Leetcode C++ Solution

Course Schedule II | Graph DFS | Cycle Detection in Directed Graph | Leetcode C++

Bellman-Ford Algorithm | Single Source Shortest Path | GFG Code in C++

Course Schedule | Graph DFS | Cycle Detection in Directed Graph | Leetcode C++

Detect Cycle in a Directed Graph using DFS | Graph Algorithms Explained

Cycle Detection in Undirected Graph | Detailed Explanation & GFG Code Implementation

Is Graph Bipartite? (LeetCode C++ Solution) | Graph Playlist

Find If a Path Exists in a Graph | DFS Approach Explained with Code