Questions and answers for exam Preparation

MCQs

Total Questions : 10

What is the output of this program?

1.
#include
2.
using namespace std;
3.
class number
4.
{
5.
int i;
6.
public:
7.
int geti();
8.
void puti(int j);
9.
};
10.
int number::geti()
11.
{
12.
return i;
13.
}
14.
void number::puti(int j)
15.
{
16.
i = j;
17.
}
18.
int main()
19.
{
20.
number s;
21.
s.puti(10);
22.
cout

Discuss Question

Answer: Option A. -> 10

We are getting the number and copying it to j and printing it.
Output:
$ g++ obj2.cpp
$ a.out
10

Question 2.

Which special character is used to mark the end of class?

;
:
#
$

Discuss Question

Answer: Option A. -> ;

None.

Question 3.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
class sample
4.
{
5.
private:
6.
int var;
7.
public:
8.
void input()
9.
{
10.
cout

Enter an integer 5 Variable entered is 5
runtime error
error
none of the mentioned

Discuss Question

Answer: Option C. -> error

While using private member, you cant access it variable.

Question 4.
Pick out the other definition of objects.

member of the class
associate of the class
attribute of the class
instance of the class

Discuss Question

Answer: Option D. -> instance of the class

None.

Question 5.

How many objects can present in a single class?

1
2
3
as many as possible

Discuss Question

Answer: Option D. -> as many as possible

Because a class may contain any number of objects according to itâ€™s compliance.

Question 6.

What is the output of the program?

1.
#include
2.
using namespace std;
3.
class Rect
4.
{
5.
int x, y;
6.
public:
7.
void set_values (int,int);
8.
int area ()
9.
{
10.
return (x * y);
11.
}
12.
};
13.
void Rect::set_values (int a, int b) {
14.
x = a;
15.
y = b;
16.
}
17.
int main ()
18.
{
19.
Rect recta, rectb;
20.
recta.set_values (5, 6);
21.
rectb.set_values (7, 6);
22.
cout << "recta area: " << recta.area();
23.
cout << "rectb area: " << rectb.area();
24.
return 0;
25.
}

recta area: 30 rectb area: 42
recta area: 20 rectb area: 34
recta area: 30 rectb area: 21
none of the mentioned

Discuss Question

Answer: Option A. -> recta area: 30 rectb area: 42

We are calculating the area of rectangle by two objects.

Question 7.

What is the output of the following program?

1.
#include
2.
using namespace std;
3.
class Box
4.
{
5.
public :
6.
double length;
7.
double breadth;
8.
double height;
9.
};
10.
int main( )
11.
{
12.
Box Box1;
13.
double volume;
14.
Box1.height = 5;
15.
Box1.length = 6;
16.
Box1.breadth = 7.1;
17.
volume = Box1.height * Box1.length * Box1.breadth;
18.
cout

Discuss Question

Answer: Option B. -> 213

In the above program, we are calculating the area of the cube by using the cube formula
Output:
$ g++ obj1.cpp
$ a.out
213