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full stack .net developer Interview Questions and Answers for Freshers

Updated 11 Apr 2024

Q1. What is Data abstraction in Oops ?

Ans.

Data abstraction in OOPs is the concept of hiding the implementation details of a class and only showing the necessary information to the outside world.

  • Data abstraction allows for creating abstract classes and interfaces to define the structure of a class without revealing the implementation details.

  • It helps in reducing complexity by only showing the essential features of an object.

  • By using abstract classes and interfaces, data abstraction enables code reusability and modular...read more

Q2. What is static Method ?

Ans.

A static method is a method that belongs to the class itself, rather than to instances of the class.

  • Static methods can be called directly on the class without needing an instance of the class.

  • They are commonly used for utility methods that do not require access to instance variables.

  • Static methods cannot access non-static members of the class.

  • Example: Math.Max() is a static method in the Math class that returns the larger of two numbers.

Q3. What is collection?

Ans.

A collection is a group of related objects or data items that are stored together.

  • Collections in .NET include List, Dictionary, Queue, Stack, etc.

  • Collections allow for easy manipulation and organization of data.

  • Example: List names = new List();

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Q4. What is Interface?

Ans.

An interface in .NET is a reference type that defines a contract for classes to implement certain methods and properties.

  • Interfaces contain method signatures but no implementation.

  • Classes can implement multiple interfaces.

  • Interfaces are used to achieve abstraction and multiple inheritance in C#.

  • Example: public interface IShape { void Draw(); }

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Q5. What is overriding ?

Ans.

Overriding is a concept in object-oriented programming where a subclass provides a specific implementation of a method that is already provided by its parent class.

  • Occurs in inheritance when a subclass provides a specific implementation for a method that is already defined in its parent class

  • The method in the subclass must have the same name, return type, and parameters as the method in the parent class

  • Allows for polymorphism, where a subclass can be treated as an instance of...read more

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