C++ Developer

The following C++ code throws an error when executed. What is the cause of this error:

class TestHack
{
public:
int *ptr;
TestHack(int i)
{
ptr = new int(i);
}

~TestHack()
{
delete ptr;
}
void Result()
{
cout << “The value is ” << *ptr;
}
};

void Hack(TestHack x)
{
cout << “Say i am in Hack ” << endl;
}

int main()
{
TestHack t1 = 10;
Hack(t1);
t1.Result();
}

What is the output of the following C++ code:

#include<iostream>
using namespace std;

class Test1{
int i;
static int j;
};

int Test1::j;

int main(){
cout << sizeof(Test1) << endl;
return 0;
}

What is the output of the following C++ code:

#include<iostream>
using namespace std;

class A{
public:
A(){
cout << “1”;
}
virtual ~A(){
cout << “2”;
}
};

class B:public A{
public:
B(){
cout << “3”;
}
~B(){
cout << “4”;
}
};

int main(){
A* obj;
obj = new B;
delete obj;
obj = new A;
delete obj;
return 0;
}