Algorithms

⏱ 8 min read C# is the dominant language at Microsoft, enterprise .NET shops, Unity game studios, and fintech companies running on Windows infrastructure. […] Read article

⏱ 9 min read A trie (prefix tree) is a tree where each node represents a character and the path from root to a Read article

⏱ 8 min read Graph problems appear in every serious technical interview. They cover a wide range of difficulty — from simple BFS/DFS traversal Read article

⏱ 8 min read Backtracking is systematic trial and error — explore a decision tree, and when you reach a dead end, undo the Read article

⏱ 8 min read Two Pointers Fundamentals Two pointers use two indices traversing an array or string to solve problems in O(n) that would Read article

⏱ 7 min read Stack and Queue Fundamentals A stack is LIFO (last-in, first-out): push adds to the top, pop removes from the top. Read article

⏱ 8 min read The Sliding Window Technique The sliding window technique optimizes brute-force O(n^2) or O(n^3) problems to O(n) by maintaining a window Read article

⏱ 8 min read Heap Fundamentals A heap is a complete binary tree satisfying the heap property: in a min-heap, every parent is smaller Read article

⏱ 8 min read Why Linked Lists Are Tested Linked lists appear in roughly 10% of coding interviews, mostly testing pointer manipulation, two-pointer techniques, Read article

⏱ 9 min read Why Binary Search Is Tested So Frequently Binary search appears in roughly 10-15% of FAANG coding interviews, both as a Read article

⏱ 8 min read What Is Dynamic Programming? Dynamic programming (DP) solves problems by breaking them into overlapping subproblems, solving each subproblem once, and Read article

⏱ 9 min read Site Reliability Engineering (SRE) and DevOps interviews mix system design, operations knowledge, and cultural questions. Google, Netflix, Uber, and most Read article

⏱ 8 min read API design questions appear in backend, platform engineering, and staff-level interviews. A poorly designed API is a permanent liability — Read article

⏱ 9 min read Object-oriented design (OOD) questions test whether you can translate real-world requirements into clean class hierarchies. Amazon, Uber, and Microsoft frequently Read article

⏱ 7 min read Kotlin is the primary language for Android development and is increasingly used for backend services (Ktor, Spring Boot). Kotlin interviews Read article