Interview Questions

So if we define the following structure

struct MyStruct
{
public int y,z;
}
and we create a structure type
MyStruct st = new MyStruct();

In case of a class, no-argument constructors are possible. Class is defined using the class keyword.

A struct cannot have an instance field, whereas a class can.

class A
{
int x = 5; //No error
...
}

struct
{
int x = 5; //Syntax Error
}

A class can inherit from one class (Multiple inheritance not possible). A Structure cannot inherit from a structure.

Enum is the keyword used to define an enumeration. An enumeration is a distinct type consisting of a set of named constants called the enumerator list. Every enumeration has an underlying type. The default type is "int". Note: char cant be the underlying data type for enum. First value in enum has value 0, each consequent item is increased by 1.

enum colors {red, green, blue, yellow};

A class is an organized store-house in object-oriented programming that gives coherent functional abilities to a group of related code. It is the definition of an object, made up of software code. Using classes, we may wrap data and behaviour together (Encapsulation). We may define classes in terms of classes (Inheritance). We can also override the behaviour of a class using an alternate behaviour (Polymorphism).

It is important to note that a class is a Reference Type. To know about Reference Types, Click Here

A Base Class is a class that is inherited by another class. In .NET, a class may inherit from only one class.
To know about Abstract Class, Click Here