Top 25 Advanced Architecture Patterns and Styles Interview Questions and Answers

Beyond the fundamentals, advanced architecture patterns and styles address scalability, resilience, and adaptability in modern software systems.

Q1. What is the Service Mesh Architecture Pattern?

Service mesh architecture manages service-to-service communication in microservices, providing observability, security, and traffic control.

Q2. What is the Saga Pattern in Microservices?

Saga pattern coordinates distributed transactions across microservices using a series of local transactions and compensating actions.

Q3. What is the Strangler Fig Pattern?

The strangler fig pattern incrementally replaces legacy systems by building new functionality around them until the old system is retired.

Q4. What is the Sidecar Pattern?

Sidecar pattern deploys auxiliary components alongside a main service, often used for logging, monitoring, or proxying.

Q5. What is the Ambassador Pattern?

Ambassador pattern offloads common tasks like monitoring, logging, or routing from the main service to a helper service.

Q6. What is the Circuit Breaker Pattern?

Circuit breaker prevents cascading failures by stopping calls to a failing service until it recovers.

Q7. What is the Bulkhead Pattern?

Bulkhead pattern isolates components so that failure in one does not affect others, improving resilience.

Q8. What is the Proxy Architecture Pattern?

Proxy pattern provides a surrogate or placeholder for another object, controlling access and adding functionality.

Q9. What is the Adapter Architecture Pattern?

Adapter pattern allows incompatible interfaces to work together by translating requests between them.

Q10. What is the Bridge Architecture Pattern?

Bridge pattern decouples abstraction from implementation, allowing them to vary independently.

Q11. What is the Composite Architecture Pattern?

Composite pattern treats individual objects and compositions uniformly, useful for hierarchical structures.

Q12. What is the Decorator Architecture Pattern?

Decorator pattern dynamically adds behavior to objects without modifying their code.

Q13. What is the Facade Architecture Pattern?

Facade pattern provides a simplified interface to a complex subsystem, improving usability.

Q14. What is the Flyweight Architecture Pattern?

Flyweight pattern minimizes memory usage by sharing common data across multiple objects.

Q15. What is the Interpreter Architecture Pattern?

Interpreter pattern defines a grammar and interprets sentences in that grammar, often used in compilers.

Q16. What is the Mediator Architecture Pattern?

Mediator pattern centralizes communication between components, reducing dependencies and complexity.

Q17. What is the Memento Architecture Pattern?

Memento pattern captures and restores an object’s state without exposing its internal structure.

Q18. What is the Observer Architecture Pattern?

Observer pattern defines a one-to-many dependency where changes in one object notify others automatically.

Q19. What is the State Architecture Pattern?

State pattern allows an object to change its behavior when its internal state changes.

Q20. What is the Strategy Architecture Pattern?

Strategy pattern defines a family of algorithms and makes them interchangeable at runtime.

Q21. What is the Template Method Pattern?

Template method defines the skeleton of an algorithm, allowing subclasses to override specific steps.

Q22. What is the Visitor Architecture Pattern?

Visitor pattern separates algorithms from object structures, enabling new operations without modifying classes.

Q23. What is the Double-Checked Locking Pattern?

Double-checked locking ensures thread-safe lazy initialization with minimal synchronization overhead.

Q24. What is the Repository Pattern?

Repository pattern abstracts data access, providing a clean separation between business logic and persistence.

Q25. What is the Unit of Work Pattern?

Unit of Work pattern tracks changes to objects and coordinates writing them to the database in a single transaction.

Top 25 Architecture Patterns and Styles Interview Questions and Answers – Part 2