a) collection of programs that manages hardware resources
b) interface between the hardware and application programs
c) system service provider to the application programs
d) all of the above
Answer: d
Explanation: An Operating System acts as an intermediary between a computer user and computer hardware. It is a program that manages hardware resources. It provides services to application programs.
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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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