this is the example of___________ class A { } class B { public B(A obj) { } } static void Main() { new B(new A()); }

154.

this is the example of___________
class A
{
}
class B
{
public B(A obj)
{
}
}
static void Main()
{
new B(new A());
}

Composition

Aggregation

Polymorphism

Inheritance

If one instance is created inside another instance so it is called composition, now if the parent instance is destroyed the instance inside it will be destroyed as well, otherwise it is Aggregation then,
In this example if the instance of the class B destroys the instance of the A will be destroyed as well
It will become Aggregation if we do this
A obj=new A();
new B(obj);