Coding Interview Resources

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we aren't the same 😂

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Python Syntax Cheatsheet 👆

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DSA (Data Structures and Algorithms) Essential Topics for Interviews 1️⃣ Arrays and Strings Basic operations (insert, delete, update) Two-pointer technique Sliding window Prefix sum Kadane’s algorithm Subarray problems 2️⃣ Linked List Singly & Doubly Linked List Reverse a linked list Detect loop (Floyd’s Cycle) Merge two sorted lists Intersection of linked lists 3️⃣ Stack & Queue Stack using array or linked list Queue and Circular Queue Monotonic Stack/Queue LRU Cache (LinkedHashMap/Deque) Infix to Postfix conversion 4️⃣ Hashing HashMap, HashSet Frequency counting Two Sum problem Group Anagrams Longest Consecutive Sequence 5️⃣ Recursion & Backtracking Base cases and recursive calls Subsets, permutations N-Queens problem Sudoku solver Word search 6️⃣ Trees & Binary Trees Traversals (Inorder, Preorder, Postorder) Height and Diameter Balanced Binary Tree Lowest Common Ancestor (LCA) Serialize & Deserialize Tree 7️⃣ Binary Search Trees (BST) Search, Insert, Delete Validate BST Kth smallest/largest element Convert BST to DLL 8️⃣ Heaps & Priority Queues Min Heap / Max Heap Heapify Top K elements Merge K sorted lists Median in a stream 9️⃣ Graphs Representations (adjacency list/matrix) DFS, BFS Cycle detection (directed & undirected) Topological Sort Dijkstra’s & Bellman-Ford algorithm Union-Find (Disjoint Set) 10️⃣ Dynamic Programming (DP) 0/1 Knapsack Longest Common Subsequence Matrix Chain Multiplication DP on subsequences Memoization vs Tabulation 11️⃣ Greedy Algorithms Activity selection Huffman coding Fractional knapsack Job scheduling 12️⃣ Tries Insert and search a word Word search Auto-complete feature 13️⃣ Bit Manipulation XOR, AND, OR basics Check if power of 2 Single Number problem Count set bits

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👋 Hello world in most popular languages

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Here are 10 popular programming languages based on versatile, widely-used, and in-demand languages: 1. Python – Ideal for beginners and professionals; used in web development, data analysis, AI, and more. 2. Java – A classic language for building enterprise applications, Android apps, and large-scale systems. 3. C – The foundation for many other languages; great for understanding low-level programming concepts. 4. C++ – Popular for game development, competitive programming, and performance-critical applications. 5. C# – Widely used for Windows applications, game development (Unity), and enterprise software. 6. Go (Golang) – A modern language designed for performance and scalability, popular in cloud services. 7. Rust – Known for its safety and performance, ideal for system-level programming. 8. Kotlin – The preferred language for Android development with modern features. 9. Swift – Used for developing iOS and macOS applications with simplicity and power. 10. PHP – A staple for web development, powering many websites and applications

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