Learn Single Responsibility Principle — a key concept for LLD interviews.
Interactive — Try it yourself!
How to use
1See "S" is selected — Single Responsibility Principle
2Read the BAD code: UserManager does 4 jobs!
3Click "✅ Good Code" — see the fix: 4 separate classes
4Read the analogy: pizza chef only makes pizza 🍕
5Click O, L, I, D to explore other principles
In a nutshell
SRP: A class should have only ONE reason to change. If a class does email + logging + user creation, changing email logic could break user creation. Split into focused classes.