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Q:

How many ways of reusing are there in class hierarchy?

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: B) 2

Explanation:

Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.

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Q:

Which of the following can derived class inherit?

A) members	B) functions
C) both a & b	D) None of the above

Answer & Explanation Answer: C) both a & b

Explanation:

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Q:

What is the general syntax for accessing the namespace variable?

A) namespaceid::operator	B) namespace,operator
C) namespace#operator	D) none of the mentioned

Answer & Explanation Answer: A) namespaceid::operator

Explanation:

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Q:

What is the output of this program ?

       #include
        using namespace std;
        int n(char, int);
        int (*p) (char, int) = n;
        int main()
        {
            (*p)('d', 9);
            p(10, 9);
            return 0;
        }
        int n(char c, int i)
        {
            cout << c << i;
            return 0;
        }

A) d99	B) d9d9
C) d9	D) compile time error

Answer & Explanation Answer: A) d99

Explanation:

In this program, we have declared the values as integer instead of character, So it is printing as d99 but it will not arise an error.

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Q:

In which of the following we cannot overload the function?

A) return function	B) caller
C) called function	D) none of the mentioned

Answer & Explanation Answer: A) return function

Explanation:

While overloading the return function, it will rise a error, So we can’t overload the return function.

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Q:

What is the output of this program?

#include
        using namespace std;
        void fun(int x, int y)
        {
            x = 20;
            y = 10;
        }
        int main()
        {
            int x = 10;
            fun(x, x);
            cout << x;
            return 0;
        }

A) 10	B) 20
C) compile time error	D) none of these

Answer & Explanation Answer: A) 10

Explanation:

In this program, we called by value so the value will not be changed, So the output is 10

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Q:

Which is more effective while calling the functions?

A) call by value	B) call by reference
C) call by pointer	D) none

Answer & Explanation Answer: B) call by reference

Explanation:

In the call by reference, it will just copy the address of the variable to access it, so it will reduce the memory in accessing it.

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Q:

What is the output of this program?

#include
        using namespace std;
        struct sec {
            int a;
            char b;
        };
        int main()
        {
            struct sec s ={25,50};
            struct sec *ps =(struct sec *)&s;
            cout << ps->a << ps->b;
            return 0;
        }

A) 252	B) 253
C) 254	D) 262

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