object oriented programming .Net interview questions and answers ~ For Job Seekers

Object oriented programming .Net interview questions and answers, oops concept in .NET, Dot NET interview Questions and answers.

Hi to all Iam sharing More .NET interview Question and answers on Concept : OBJECT ORIENTED PROGRAMMING.

1. Define enumeration ?

Enumeration is defined as the value type that consists of a set of named values. These values are constants and are called enumerators. A enumeration type is declared using the enum keyword. Each enumerator in an enumeration is associated with an underlying type that is set, by default, on the enumerator. The following is an example that creates an enumeration to store different varieties of fruits:

enum Fruits {Mango, Apple, orange, Guava};

In the preceding example, we have seen that an enumeration Fruits is created, where number 0 is associated with Mango, number 1 with Apple, number 2 with Orange, and number 3 with Guava. You can access the enumerators of an enumeration by these values.

2. In which namespace all the .NET collection classes are contained?

IN System.Collections namespace contains all the collection classes are contained.

3.. Is it good practice to the handle exceptions in code?

Yes, you must handle the exceptions in code so that you can deal with any unexpected situations that occur when a program is running. For example, dividing a number by zero or passing a string value to a variable that holds an integer value would result in an exception.

4. Explain concept of constructor?

Constructor is a special method of a class, which is called automatically when the instance of a class is created. It is created with the same name as the class and initializes all class members, whenever you access the class. The main features of a constructor are

Constructors do not have any return type
Constructors are always public
It is not mandatory to declare a constructor; it is invoked automatically by .NET Framework.

5. Can you the inherit private members of a class?

No you cannot inherit private members of a class.

6. Does THe .NET support multiple inheritance?

NO .NET does not support multiple inheritance directly because in .NET, a class cannot inherit from more than one class. .NET supports multiple inheritance through interface.

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