FUNCTIONS, CONSTRUCTOR, DESTRUCTOR & OVERLOADING QUESTIONS IN C++. (7)

Answer the questions (i) to (ii) after going through the following class:

class SCORE
{
int Scno,Max,Min,Rank;
public:
SCORE() //Function1
{
Scno = 1;
Max = 10;
Min = 2;
Rank = 5;
}
SCORE(int a, int b) //Function2
{
Scno = a;
Max = 10;
Min = 2;
Rank = 5;
}
~SCORE() //Function3
{
cout<<"Compute"<<endl;
}
void Show() //Function4
{
cout<<Scno<<":"<<Max<<":"<<Min<<endl;
cout<<"Rank"<<Rank<<endl;
}
};

(i) As per Object Oriented Programming, which concept is illustrated Function1 and Function2 together?
(ii) What is Function2 specifically referred as? When do you think, Function3 will be invoked?