C++ Programming

Question 1 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
int main()
{
typedef int hello;
hello i=9.9;
cout<<i;
}

9
9.9
9.0
Error in the program
None of the above

Question 2 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
int main()
{
int y=8,x=6;
(x=5)&&(x=7) ? y=1:y=2;
cout<<x<<"_"<<y;
}

Note: _ (underscore is used in cout statement to differentiate x & y value.

1_7
7_1
5_1
6_2
None of the above

Question 3 Multiple Choice (Single Answer)

Which of the following statements is false regarding to namespace in C++ programming?

C++ provides declaring an alias name for a given namespace.
Namespace can be declared without any name or even unnamed.
Namespace defination can be extended over multiple files.
Instance variable can be created for a namespace.
Namespace defination should not be terminated by a semicolon.

Question 4 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
int main()
{
int i,j,k=5;
for(i=1;i<=5;i++)
{
for(j=1;j<=k;j++)
{
cout<<j;
}
k=k-1;
cout<<"n";
}
}

12345
12345
12345
12345
12345
12345
1234
123
12
1
1
12
123
1234
12345
Error in the program
None of the above

Question 5 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Test
{
public:
Test()
{
cout<<"constructor of Testn";
}
~Test()
{
cout<<"destructor of Testn";
}
};
int main()
{
Test a;
Test b;
}

constructor of Test
constructor of Test
destructor of Test
destructor of Test
constructor of Test
destructor of Test
constructor of Test
destructor of Test
constructor of Test
constructor of Test
constructor of Test
destructor of Test
None of the above

Question 6 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class A
{
public:
A()
{
cout<<"Constructor of A"<<endl;
}
void Test();
};
void A::Test()
{
cout<<"This is Test"<<endl;
}
int main()
{
A a;
a.Test();
}

This is Test
This is Test
Constructor of A
Constructor of A
This is Test
Error in the program
None of the above

Question 7 Multiple Choice (Single Answer)

Which of the following statements is false regarding inline function in C++?

All functions declared inside a class are inline functions by default.
Inline functions can be declared outside a class by using inline keyword.
Any modifications in an inline function needs recompilation of the program to use modified functionality.
Declarartion of a function which is inside a class with inline keyword leads to compile time error.
By declaring small functions (with less computation time) as inline function, performance of the program is increased.

Question 8 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Parent1
{
public:
int a=10;
};
class Parent2
{
public:
int a=5;
};
class Child:public Parent1,public Parent2
{
public:
int func()
{
return a;
}
};
int main()
{
Child ch;
cout<<ch.func();
}

10
5
10
5
Compile time error
None of the above

Question 9 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Parent
{
public:
void func()
{
cout<<"function of Parent"<<endl;
}
};
class Child:public Parent
{
public:
void func()
{
cout<<"function of Child"<<endl;
}
};
int main()
{
Child ch;
ch.func();
}

function of Parent
function of Child
function of Child
function of Parent
function of Child
function of Parent
Error in the program

Question 10 Multiple Choice (Single Answer)

Choose the appropriate true statement among the given options with reference to C++ programming.

Friend function of a class cannot access private members of the given class.
It is not mandatory to have a pure virtual function(s) in an abstract class.
We can create object for an abstract class.
If a class inherits abstract class and doesn't implement pure virtual functions of base class, then derived class also becomes abstract class.
None of the above

Question 11 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Test
{
public:
int a=9;
void func()
{
cout<<aa;
}
};
class Hello:public Test
{
public:
void func(int x)
{
cout<<ax;
}
};
int main()
{
Hello obj;
obj.func(5);
}

81
45
25
Error in the program
None of the above

Question 12 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Test
{
protected:
int a=10,b=5;
public:
virtual int func()=0;
};
class Imp:public Test
{
public:
int func()
{
int x=++a*b++;
return x;
}
};
int main()
{
Imp i;
cout<<i.func();
}

60
66
50
55
Compile time error

Question 13 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Test
{
public:
mutable int a; /line1/
Test() /line2/
{
a=10; /line3/
}
void func() const /line4/
{
a++; /line5/
cout<<a;
}
};
int main()
{
const Test obj;
obj.func();
}

Error at line5
Error at line4
Error at line3
11
Error at line1

Question 14 Multiple Choice (Single Answer)

Identify the type of inheritance used in the following C++ code snippet.

class A
{ };
class B:public A
{ };
class C:public A
{ };
class D:public A
{ };

Multiple inheritance
Single or simple inheritance
Hierarchical inheritance
Multilevel inheritance
None of the above

Question 15 Multiple Choice (Single Answer)

What is the output of C++ program given below?

#include<iostream>
using namespace std;
class Parent
{
public:
int a=10,b=20;
};
class Middle:protected Parent
{
public:
Middle()
{
a++;
b--;
}
};
class Child:private Middle
{
public:
int hello()
{
return a*b;
}
};
int main()
{
Child ch;
cout<<ch.hello();
}

200
209
189
Compile time error
None of the above

Questions