LeetCode was HARD until I Learned these 15 Patterns: 1. Prefix Sum 2. Two Pointers 3. Sliding Window 4. Fast & Slow Pointers 5. LinkedList In-place Reversal 6. Monotonic Stack 7. Top ‘K’ Elements 8. Overlapping Intervals 9. Modified Binary Search 10. Binary Tree Traversal 11.

If you want to load balance traffic, here are 6 algorithms to consider: 1 Round robin: ↳ The load balancer forwards the request to the servers in a sequential order 2 Weighted round robin: ↳ The load balancer forwards the request based on server capacity 3 Least

DNS record types you must know

4 main database types

Statistics 110: Probability from Harvard University.