Design Patterns and Principles Interview Questions

DesignPattern-and-Principles-Interview-Questions

A Design Pattern is a description or template for how to solve a problem that can be used in many different situations. Design patterns can speed up the development process by providing time-tested, proven development paradigms.

The Design Principles are the rules a designer must follow to create an effective and attractive composition. There are several principles that are used to organize and arrange the structural components of Software design. Software Designs in which these principles are applied affect the content and the working process of the software from the beginning.

In Software Industry the Design Patterns and Principles are always followed. So this is the most common topic for the interview. In this article, we will see the most frequently asked Design Patterns and Principles Interview Questions.

Please visit here for the .Net Most Common Interview Questions.

Please visit our Youtube Channel for more Interview Questions and Answers videos by the below link:

Watch Interview Questions and Answers videos here.

Below are the Most Common Interview Questions based on the Design Patterns and Principles:

Q01. What is Design Pattern and why one should use it? How it is different from the Design Framework?

Q02. What is the difference between Design Patterns and Design Principles?

Q03. What is the difference between Design Patterns and Architectural Patterns?

Q04. What is the difference between N-Tire Architecture and N-Layer Architecture?

Q05. What is the N-Layer Architecture? Why layering your application is important?

Q06. What is Microservices Architecture? What are the advantages of using it?

Q07. What is the difference between Monolithic and Microservices Architecture?

Q08. What is Service-Oriented Architecture (SOA)? What are the advantages of it?

Q09. What is Agile Methodology? How it is different from the Traditional Waterfall process model?

Q10. Which methodology did you use in your current project?

Q11. What is the difference between Cohesion and Coupling? What is the relationship between them? How it plays a vital role in application designing?

Q12. What are the different Object-Oriented Design Principles used in .NET?

Q13. What are the SOLID Design Principles?

Please read the complete article of the SOLID Principles here.

Q14. What is the Single Responsibility Principle (SRP)?

Please read the complete article of the Single Responsibility Principle of SOLID here.

Q15. What is the Open-Closed Principle (OCP)?

Please read the complete article of the Open-Closed Principle of SOLID here.

Q16. What is Liskov Substitution Principle (LSP)?

Please read the complete article of the Liskov Substitution Principle of SOLID here.

Q17. What is Interface Segregation Principle (ISP)?

Please read the complete article of the Interface Segregation Principle of SOLID here.

Q18. What is the Dependency Inversion Principle (DIP)? How it is different from Dependency Injection (DI)?

Please read the complete article on the Dependency Inversion Principle of SOLID here.

Q19. What is Inversion of Control (IoC)? Are DIP and IoC the same?

Please read about the Inversion of Control vs DIP here.

Q20. What is GOD Class or GOD Object and why should we avoid it?

Q21. What is Gang of Four (GOF)?

Q22. What is Dependency Injection (DI)? What problems does Dependency Injection solve? How DI is different from Inversion of Control?

Please read about the Dependency Injection here.

Q23. What is the difference between the Dependency Injection (DI) and Service Locator Patterns (SLP)?

Q24. What is the MVC Pattern? How it is different from 3-Layer Architecture?

Q25. What is Repository Pattern? How Repository Pattern is different from the Entity Framework?

Q26. What is ORM Pattern? What are the different ORM pattern models available in the .Net Framework?

Q27. What is Data Access Object (DAO) Pattern?

Q28. What is the Null Object Pattern?

Q29. What are Anti-Patterns? Can you give me some pattern names that are considered anti-pattern?

Q30. What is Service Locator Pattern (SLP)? When service locator pattern is used?

Q31. What is Intercepting Pattern (IP)? When can you use the Intercepting Pattern?

Q32. What are the different design patterns available in the .NET Framework?

Q33. What are the Creational Design Patterns (CDP)? What are the different Creational Design Patterns?

Q34. What are the Structural Design Patterns (SDP)? What are the different Structural Design Patterns?

Q35. What are the Behavioral Design Patterns (BDP)? What are the different Behavioral Design Patterns?

Q36. What is Factory Design Pattern (FDP)? When to use the Factory Creational Design Pattern?

Q37. Why do we use a factory class to instantiate a class when we can use a new operator directly?

Q38. What is Abstract Factory Design Pattern (AFDP)? When to use the Abstract Factory Creational Design Pattern?

Q39. What is the difference between Factory and Abstract Factory Design Pattern?

Q40. What is Builder Design Pattern (BDP)? When to use the Builder Creational Design Pattern?

Q41. What is Prototype Design Pattern (PDP)? When to use the Prototype Creational Design Pattern?

Q42. What is the benefit of using a Prototype Design Pattern over creating an instance using the new keyword?

Q43. What is Singleton Design Pattern (SDP)? When to use the Singleton Creational Design Pattern?

Please read the complete article on the Singleton Design Pattern of OOD here.

Q44. What is the difference between Static Class and Singleton Pattern?

Please read the complete article on the Static Class here.

Q45. Why Singleton Pattern is considered an Anti-Pattern?

Please read the complete article on the Singleton Anti Pattern of OOD here.

Q46. Is it possible to create a clone of a singleton object? How can you prevent creating another instance of singleton using the clone() method?

Please read the complete article on the Singleton Object Cloning and Prevention here.

Q47. What is Adapter Design Pattern (ADP)? When to use the Adapter Structural Design Pattern?

Q48. What is Decorator Design Pattern (DDP)? When to use the Decorator Structural Design Pattern?

Q49. What is Composite Design Pattern (CDP)?

Q50. What is Proxy Design Pattern (PDP)? When to use the Proxy Structural Design Pattern?

Q51. What is Façade Design Pattern (FDP)? What is the difference between Façade and Mediator?

Q52. What is Bridge Design Pattern (BDP)?

Q53. What is Flyweight Design Pattern (FDP)?

Q54. What is Iterator Design Pattern (IDP)? When to use the Iterator Behavioral Design Pattern?

Q55. What is Observer Design Pattern (ODP)? When to use the Observer Behavioral Design Pattern?

Q56. What is Mediator Design Pattern (MDP)? When to use the Mediator Behavioral Design Pattern?

Q57. What is Interpreter Design Pattern (IDP)?

Q58. What is Command Design Pattern (CDP)?

Q59. What is Memento Design Pattern (MDP)?

Q60. What is State Design Pattern (SDP)?

Q61. What is Strategy Design Pattern (SDP)? When to use the Strategy Design Pattern?

Q62. What is Visitor Design Pattern (VDP)?

Q63. What is Template Design Pattern (TDP)?

Q64. What is Chain of Responsibility Design Pattern?

Q65. What is Circular Dependency and how can you resolve this issue?

Q66. What are the General Responsibility Assignment Software Principles (GRAPS) principles?

Watch our related videos here

2 comments:

Code FencersDecember 8, 2021 at 5:06 AM
Really helpful down to the ground, happy to read such a useful post. I got a lot of information through it and I will surely keep it in my mind. Keep sharing. Custom Software Development Company Los Angeles

Please do not enter any HTML. JavaScript or spam link in the comment box.

Sunday, November 7, 2021

Design Patterns and Principles Interview Questions