a university undergrad made hash tables faster and broke 40-year-old belief 🤯 for 40 years, it was believed that we cannot have better than O(n) operation for hash table worst case inserts and searches if it uses open addressing - for the hash index, look linearly until you…
If you want to become good at system design (in 1 month), learn these case studies:
100+ LeetCode Problems with Solutions Perfect for mastering coding interviews and problem-solving in 2024! All, FREE of cost! Simply: 1. Follow me (So I can DM) 2. Like & Repost 3. Comment "LeetCode" to receive the guide. Let’s ace those coding interviews together!
If I had to optimize latency, here are 12 rules I'd consider:
Choosing a Data Structure 👇 Fast lookup → HashMap Sorted order → Balanced BST (AVL, Red-Black Tree) FIFO/LIFO → Queue / Stack Prefix search → Trie Connectivity → Union-Find Range queries → Segment Tree Streaming median → Two Heaps Sliding window → Deque…
𝗔𝗜 𝗔𝗴𝗲𝗻𝘁’𝘀 𝗠𝗲𝗺𝗼𝗿𝘆 is the most important piece of 𝗖𝗼𝗻𝘁𝗲𝘅𝘁 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴, this is how we define it 👇 In general, the memory for an agent is something that we provide via context in the prompt passed to LLM that helps the agent to better plan and…
Most people think SQL is slow. It’s not. Their queries suck. A simple introduction to Functional Indexes. What’s a Functional Index? - A normal index says: “I’ll help you find this column faster.” - A functional index says: “I’ll help you find the result of this function…
Which chunking technique should you use for your RAG system? Here's a quick cheat sheet of 8 popular chunking strategies: Read the full deep-dive into each with code examples and decision frameworks: weaviate.io/blog/chunking-…
𝗟𝗮𝘁𝗲𝗻𝗰𝘆 𝗡𝘂𝗺𝗯𝗲𝗿𝘀 𝗘𝘃𝗲𝗿𝘆 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗲𝗿 𝗦𝗵𝗼𝘂𝗹𝗱 𝗞𝗻𝗼𝘄 Check the main latency numbers: L1 cache reference ......................... 0.5 ns Branch mispredict ............................ 5 ns L2 cache reference ........................... 7 ns Mutex…
𝗠𝗼𝘀𝘁 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝘂𝘀𝗲 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀 𝗱𝗮𝗶𝗹𝘆 𝗯𝘂𝘁 𝗻𝗲𝘃𝗲𝗿 𝗹𝗲𝗮𝗿𝗻 𝘁𝗵𝗲𝗺 𝗽𝗿𝗼𝗽𝗲𝗿𝗹𝘆 They know how to `SELECT *`, maybe add an index, but the deeper parts remain a black box: 🔹 Why does this query run slowly? 🔹 What’s MVCC, and why does…
As promised, top algorithms to know. Sorted by usefulness. 1. Binary search 2. KMP (string search, not call to action) 3. Quick Sort 4. Merge Sort 5. Fast Fourier Transform (FFT) 6. Depth-First Search (DFS) 7. Breadth-First Search (BFS) 8. Topological Sort 9. Lowest Common…
Since this is trending, here’s a complete list of Data Structures to implement from my CS curriculum: 1. Linked List 2. Dynamic Array 3. Stack 4. Ring-buffer Queue 5. Deque 6. Binary Heap 7. Binomial Heap 8. HashMap with Open Addressing 9. HashMap with Separate Chaining 10.…
You’re in a backend interview. They ask: "Your API shows 200 OK, but clients report missing data. Where do you start?" Here's an answer: Check logs & traces – confirm if the API actually returned full payload or if data was missing before serialization. Inspect DB queries –…
I created a GitHub repository to help you learn with Java interview And, it received 250+ stars on GitHub It gives you: - Java interview questions by topic - Core Java Fundamentals - Java interview resources repo - github.com/javabuddy/awes…
You’re in a backend interview. They ask: "An API endpoint is abused, how would you design your defense?" Here’s how you can answer 👇
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