Graph algorithms for beginners
Can someone explain BFS and DFS with examples? When do I use each?...
Showing 13 problems
with active filters
CAP theorem explained
What is the CAP theorem in distributed systems? Can you explain with real examples?...
P vs NP problem explained simply
What is the P vs NP problem and why is it important? I've heard it's unsolved....
Understanding dynamic programming
Dynamic programming seems like magic to me. How do I identify DP problems and solve them?...
Database scaling: vertical vs horizontal
My database is becoming a bottleneck. Should I: - Scale vertically (bigger server)? - Scale horizontally (sharding/replication)? What are the trade-offs? How do I decide which approach to use?...
Microservices vs Monolith - how to decide?
I'm designing a new system and can't decide between microservices and monolithic architecture. What factors should I consider? When is microservices overkill? What are the hidden costs of microservic...
Binary Search Tree vs Hash Table
When should I use a BST vs a hash table? What are the trade-offs?...
When to use BFS vs DFS for graph traversal?
I understand how BFS and DFS work, but I'm not sure when to use which one. Can someone explain: 1. When is BFS better? 2. When is DFS better? 3. What about space complexity considerations? 4. Any rea...
How does a hash table work internally?
I use dictionaries/maps all the time, but I want to understand how they work: 1. How is the hash function used? 2. What happens with hash collisions? 3. Why is lookup O(1)? 4. When does it become O(n...
How does a neural network learn?
Can someone explain backpropagation and gradient descent in simple terms?...
Understanding recursion vs iteration
I can write iterative solutions but struggle with recursive thinking. Can someone help me understand: 1. How to think recursively 2. When to use recursion vs iteration 3. What about the call stack an...
How does a database index work?
What happens internally when I create an index on a database column? How does it speed up queries?...
Understanding load balancing algorithms
What are the different load balancing algorithms? Round robin, least connections, etc.?...