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Q:

Where does the exceptions are used?

A) Exceptions are used when postconditions of a function cannot be satisfied.	B) Exceptions are used when postconditions of a function can be satisfied.
C) To preserve the program	D) none of these

Answer & Explanation Answer: B) Exceptions are used when postconditions of a function can be satisfied.

Explanation:

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Q:

How do define the user-defined exceptions?

A) inheriting and overriding exception class functionality.	B) overriding class functioality.
C) inheriting class functionality	D) none of the mentioned

Answer & Explanation Answer: A) inheriting and overriding exception class functionality.

Explanation:

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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:

What is the user-defined header file extension in c++?

A) cpp	B) h
C) hf	D) none of these

Answer & Explanation Answer: B) h

Explanation:

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Q:

What is the use of Namespace?

A) To encapsulate the data	B) To structure a program into logical units.
C) Both a and b	D) none of these

Answer & Explanation Answer: B) To structure a program into logical units.

Explanation:

The main aim of the namespace is to understand the logical units of the program and to make the program so robust.

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Q:

which keyword is used to define the macros in c++?

A) macro	B) define
C) #define	D) none of these

Answer & Explanation Answer: C) #define

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:

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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