a) Encapsulation
b) Polymorphism
c) Inheritance
d) Abstraction
Answer: c
Explanation: Inheritance allows you to reuse your already written code by inheriting the properties of written code into other parts of the code, hence allowing you to reuse the already written code.
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What will be the output of the following C++ code?
#include <iostream>
int const s=9;
int main()
{
std::cout << s;
return 0;
}What will be the output of the following C++ code?
#include <iostream>
int main()
{
const int x;
x = 10;
printf(“%d”, x);
return 0;
}What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Point
{
int x, y;
public:
Point(int i = 0, int j =0)
{ x = i; y = j; }
int getX() const { return x; }
int getY() {return y;}
};int main()
{
const Point t;
cout << t.getX() << ” “;
cout << t.gety();
return 0;
}Const qualifier can be applied to which of the following?
i) Functions inside a class
ii) Arguments of a function
iii) Static data members
iv) Reference variablesWhat will be the output of the following C++ code?
#include <iostream>
class Test
{
public:
void fun();
};
static void Test::fun()
{
std::cout<<“fun() is static”;
}
int main()
{
Test::fun();
return 0;
}What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Test
{
private:
static int count;
public:
Test& fun();
};
int Test::count = 0;
Test& Test::fun()
{
Test::count++;
cout << Test::count << ” “;
return *this;
}
int main()
{
Test t;
t.fun().fun().fun().fun();
return 0;
}What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class A
{
private:
int x;
public:
A(int _x) { x = _x; }
int get() { return x; }
};
class B
{
static A a;
public:
static int get()
{ return a.get(); }
};
int main(void)
{
B b;
cout << b.get();
return 0;
}
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