iTech India Junior .NET Developer Interview Questions and Answers

Datatype is a classification of data which tells the compiler or interpreter how the programmer intends to use the data.

• Datatypes specify the type of data that a variable can hold.

• Examples include int (integer), string (text), bool (boolean), etc.

• Different programming languages have different datatypes and rules for their usage.

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Allows for code reusability by creating a new class based on an existing class

• Derived class (child class) inherits attributes and methods from a base class (parent class)

• Example: Class Car can inherit properties like color and methods like drive from class Vehicle

A class is a blueprint for creating objects, while an object is an instance of a class.

• A class defines the properties and behaviors of objects.

• An object is created based on a class, and can have its own unique values for the properties defined in the class.

• Example: Class 'Car' may have properties like 'color' and 'model', while an object of class 'Car' could be 'red Ferrari'.