1.
What is object-oriented programming (OOP)?
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Xamarin OOP interview questions.
Only challenges
- 2.
What is inheritance?
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- 3.
Can you inherit private members of a class?
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- 4.
What is polymorphism?
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- 5.
What is encapsulation?
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- 6.
Why is the virtual keyword used in code?
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- 7.
Explain the concept of constructor?
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- 8.
What is the difference between procedural and object-oriented programming?
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- 9.
What is the difference between a class and a structure?
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- 10.
What is an object?
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- 11.
What is a class?
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- 12.
What is the relationship between a class and an object?
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- 13.
Explain the basic features of OOPs
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- 14.
A structure in C# can implement one or more interfaces. Is it true or false?
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- 15.
What is polymorphism, what is it for, and how is it used?
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- 16.
How can you prevent a class from overriding in C#?
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- 17.
When should I use a struct instead of a class?
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- 18.
What are abstract classes? What are the distinct characteristics of an abstract class?
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- 19.
How can you prevent your class to be inherited further?
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- 20.
What are the different ways a method can be overloaded?
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- 21.
Is it possible for a class to inherit the constructor of its base class?
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- 22.
How is method overriding different from method overloading?
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- 23.
State the features of an interface.
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- 24.
How could you defineAbstraction in OOP?
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- 25.
Can you specify the accessibility modifier for methods inside the interface?
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- 26.
Can you allow a class to be inherited, but prevent a method from being overridden in C#?
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- 27.
What do you mean by data encapsulation?
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- 28.
What are similarities between a class and a structure?
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- 29.
Interface or an Abstract Class: which one to use?
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- 30.
Explain the concept of destructor?
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- 31.
What is Coupling in OOP?
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- 32.
What exactly is the difference between an interface and abstract class?
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- 33.
Explain different types of inheritance.
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- 34.
Differentiate between an abstract class and an interface.
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- 35.
When should I use an interface and when should I use a base class?
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- 36.
What is the difference between an abstract function and a virtual function?
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- 37.
What is the difference between cohesion and coupling?
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- 38.
Does .NET support multiple inheritance?
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- 39.
Can you declare an overridden method to be static if the original method is not static?
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- 40.
What is a static constructor?
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- 41.
What is Cohesion in OOP?
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- 42.
What's the advantage of using getters and setters - that only get and set - instead of simply using public fields for those variables?
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- 43.
Can you declare a private class in a namespace?
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- 44.
In terms that an OOP programmer would understand (without any functional programming background), what is a monad?
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- 45.
What is the difference between association, aggregation and composition?
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- 46.
Can you provide a simple explanation of methods vs. functions in OOP context?
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- 47.
You have defined a destructor in a class that you have developed by using the C# programming language, but the destructor never executed. Why did the destructor not execute?
Answer:
- 48.
What is LSP (Liskov Substitution Principle) and what are some examples of its use (good and bad)?
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- 49.
Could you elaborate Polymorphism vs Overriding vs Overloading?
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- 50.
What does it mean to “program to an interface”?
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- 51.
Why Doesn't C# Allow Static Methods to Implement an Interface?
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- 52.
What is the difference between a mixin and inheritance?
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- 53.
Why prefer composition over inheritance? What trade-offs are there for each approach? When should you choose inheritance over composition?
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- 54.
How do I test a private function or a class that has private methods, fields or inner classes?
Answer:
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