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1
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

Answer:   A) 252



Explanation:

In this program, We are dividing the values of a and b, printing it.

Subject: C++
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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 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 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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1 3677
Q:

How many types of modularization are there in c++?

A) 4 B) 3
C) 1 D) none of these
 
Answer & Explanation Answer: D) none of these

Explanation:

There are two types of modular programming.They are interface and implementation.

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6 10643
Q:

How many types of macros are there in c++?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:

There are two types of macros. They are object-like and function-like.

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1 7039
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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1 5280
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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3 16343
Q:

What are the mandatory part to present in function pointers?

A) & B) retrun values
C) data types D) none of these
 
Answer & Explanation Answer: C) data types

Explanation:

The data types are mandatory for declaring the variables in the function pointers.

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