System Design Interview: Design a Distributed Job Scheduler (Airflow/Celery)
System Design Interview: Design a Distributed Job Scheduler A distributed job scheduler runs tasks reliably across a cluster of machines. […]
System Design
Algorithms
Trie and String Matching Interview Patterns: Autocomplete, KMP, Rabin-Karp
Trie and String Matching Interview Patterns Tries (prefix trees) and string matching algorithms are a distinct category in coding interviews.
System Design
System Design Interview: Design a Live Video Streaming Platform (Twitch)
System Design Interview: Design a Live Video Streaming Platform (Twitch) Live streaming is fundamentally different from video-on-demand (Netflix/YouTube). A streamer
Algorithms
Amortized Analysis and Complexity Patterns: Dynamic Arrays, Union-Find, Monotonic Deque
Amortized Analysis and Time Complexity Patterns Amortized analysis evaluates the average performance of operations over a sequence, not worst-case per
System Design
System Design Interview: Design a Distributed Key-Value Store (DynamoDB/Cassandra)
System Design Interview: Design a Distributed Key-Value Store A distributed key-value store is one of the foundational system design questions
System Design
System Design Interview: Design a Web Search Engine (Google)
System Design Interview: Design a Web Search Engine Designing a web search engine is one of the most technically rich
Algorithms
Minimum Spanning Tree: Kruskal’s and Prim’s Algorithm Interview Guide
Minimum Spanning Tree: Kruskal’s and Prim’s Algorithms A Minimum Spanning Tree (MST) connects all vertices of a weighted graph with
Algorithms
Dynamic Programming Patterns II: Knapsack, LCS, Edit Distance & State Machines
Dynamic Programming Patterns II: Knapsack, LCS, Edit Distance Beyond simple memoization, there are classic DP problem families where recognizing the
Algorithms
OOD Interview Patterns: LRU Cache, Parking Lot & Elevator System
Object-Oriented Design (OOD) Interview Patterns: LRU Cache, Parking Lot & More OOD interviews ask you to design a system using
System Design
System Design Interview: Design a Social Media Feed (Twitter/Instagram)
System Design: Design a Social Media Feed (Twitter/Instagram) News feed design is one of the most comprehensive system design problems
Algorithms
Recursion and Backtracking Interview Patterns: Permutations, N-Queens, Sudoku
Recursion and Backtracking Interview Patterns Backtracking is systematic exhaustive search with pruning. It builds candidates incrementally and abandons (backtracks) as
System Design
System Design Interview: Design a Ride-Sharing App (Uber/Lyft)
System Design: Design a Ride-Sharing App (Uber/Lyft) Designing Uber or Lyft is one of the most popular system design interview
Algorithms
String Interview Patterns: Anagram, Palindrome, KMP & Encoding
String Interview Patterns: Anagram, Palindrome, KMP & More String problems are among the most common in coding interviews. Beyond brute-force
Algorithms
Interval Problem Patterns: Merge, Insert, Meeting Rooms & Scheduling
Interval Problem Patterns: Merge, Insert, Overlap & Scheduling Interval problems require manipulating ranges [start, end]. They appear frequently in meeting
System Design
System Design Interview: Design a CI/CD Deployment Pipeline
System Design: Design a Code Deployment System (CI/CD Pipeline) Designing a CI/CD (Continuous Integration / Continuous Deployment) system is asked