Tech

C++

1. C++ Template Programming: From Generic Functions to Library Design
2. C++ Threads, Mutexes, and Condition Variables
3. Understanding C++ Concurrency: Locks, Conditions, and Queues
4. RAII: Deterministic Resource Management in C++
5. C++ Value Categories: lvalues, rvalues, and std::move
6. Next Greater Element II: Circular Monotonic Stack
7. Detect Squares
8. Number of Islands
9. Max Area of Island
10. Design a Hit Counter
11. Assign Rental Cars to Time-Window Requests
12. C++ Iterators and Invalidation
13. C++ List and LRU Patterns
14. C++ Deque and Sliding Windows
15. C++ Queue, Stack, and Priority Queue
16. Max Points on a Line
17. C++ Sets and Multisets
18. C++ Maps and Hashing
19. C++ Vector and String
20. Graph Representation and DFS
21. C++ Containers Index
22. Top N Tickers by Traded Volume
23. LRU Cache
24. Algorithms Index
25. Segment Tree and Fenwick Tree
26. String Algorithms
27. Dynamic Programming
28. Binary Search Patterns
29. Monotonic Stack and Deque
30. Sliding Window and Two Pointers
31. Topological Sort and SCC
32. Shortest Path and MST
33. Disjoint Set Union
34. Trees
35. Basic Algorithms
36. C++ Value Semantics: Rule of Zero, Copy, and Move

Distributed Systems Components

1. Distributed ID Generation: Snowflake, Sequences, UUIDs, and Clock Failure
2. Inside Distributed Rate Limiters: Token Buckets, Sliding Windows, and Global Quotas
3. Distributed Locks: Leases, Fencing Tokens, Sessions, and Failure Safety
4. Inside Distributed Transactions: 2PC, Sagas, Outbox, Idempotency, and Recovery
5. Inside a CDN: Cache Keys, Freshness, Revalidation, and Origin Protection
6. Inside a WebSocket Server: Connections, Event Loops, Backpressure, and Scaling
7. Inside Raft: Leader Election, Log Replication, Quorums, and Safety
8. Inside a Load Balancer: Connections, Scheduling, Health, and Failover
9. Geohashing: Scalable Geospatial Indexing for Distributed Systems
10. CAP Theorem: What a Network Partition Actually Forces You to Choose
11. S3 Multi part upload
12. Inside Redis Cluster: Slots, Gossip, Replication, and Failover
13. SSTable
14. Inside Cassandra: Partitioning, Replication, Storage, and Repair
15. Inside Apache Kafka: Partitions, Replication, Consumer Groups, and KRaft
16. Inside Service Discovery: Registries, Health, Routing, and Stale Endpoints
17. Inside Sharding: Partition Maps, Consistent Hashing, Rebalancing, and Hotspots
18. Inside Replication: Logs, Acknowledgements, Failover, and Convergence
19. Distributed Cache
20. Inside ZooKeeper: Znodes, Sessions, Watches, Zab, and Fencing
21. Comparison between databases
22. Inside Bigtable: Tablets, SSTables, Compaction, and Recovery
23. Inside GFS: Chunks, Leases, Mutation Ordering, and Recovery

System Design

1. Design Deliveroo
2. Design Uber
3. Design Twitter
4. Design Tiny URL
5. Design Booking Service
6. Design Collabrative Editing
7. Design Web Crawler
8. Capacity Estimation for System Design: Traffic, Storage, Bandwidth, and Headroom
9. Design Chat Application
10. Design Data Intensive Applications

Cloud

1. Containers from First Principles

LeetCode

1. Two Pointers II (Advanced)
2. Sliding Window II
3. Two Pointers I
4. Sliding Window I
5. Arrays Basics & STL
6. Strings and Hashmaps I

Artificial Intelligence

1. Evaluation Metrics for Classification Models