Real-World Design and Architecture Scenarios Interview Questions | OOPS | NextRound

1How would you model a Bird class? What issues arise when you try to add a Penguin or Ostrich? (LSP violation)Intermediate

2How do you handle Cross-Cutting Concerns (Logging, Caching, Authentication) without polluting business logic? (AOP/Proxy/Decorator)Intermediate

3Design a simple Logger class. Should it be Static, Singleton, or injected via Interface? Justify.Intermediate

4You have a class that validates user input. The validation rules change frequently. Which pattern would you use and why?Intermediate

5You need to cache data. Some data expires in 1 minute, some in 1 hour. How do you design this using OOP?Intermediate

6How would you design a Plugin Architecture?Advanced

7What is the Anemic Domain Model? Why is it considered an anti-pattern by many?Intermediate

8How would you design a Payment Gateway integration that supports multiple providers (PayPal, Stripe)?Intermediate

9How would you design a system for a Car that has different engine types (Petrol, Diesel, Electric)? Show the OOP model.Intermediate

10What is Domain-Driven Design (DDD) in a nutshell? How does it relate to OOP?Intermediate

11How do you design an Undo/Redo functionality? (Command Pattern)Intermediate