What is the output of this program ? | C++ Questions & Answers

Q:

What is a template?

A) A template is a formula for creating a generic class	B) A template is used to manipulate the class
C) A template is used for creating the attributes	D) none of the mentioned

Answer & Explanation Answer: A) A template is a formula for creating a generic class

Explanation:

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Q:

How many kinds of classes are there in c++?

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

Answer & Explanation Answer: B) 2

Explanation:

There are two kinds of classes in c++. They are absolute class and concrete class.

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Q:

How many types of constructor are there in C++?

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

Answer & Explanation Answer: C) 3

Explanation:

There are three types of constructor in C++. They are Default constructor, Parameterized constructor, Copy constructor.

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Q:

What does inheriatance allows you to do?

A) create a class	B) access methods
C) create a hierarchy of classes	D) None of the mentioned

Answer & Explanation Answer: C) create a hierarchy of classes

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 meant by pure virtual function?

A) Function which does not have definition of its own.	B) Function which does have definition of its own.
C) Function which does not have any return type.	D) None of the mentioned

Answer & Explanation Answer: A) Function which does not have definition of its own.

Explanation:

As the name itself implies, it have to depend on other class only.

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Q:

Which is also called as abstract class?

A) virtual function	B) pure virtual function
C) derived class	D) None of these

Answer & Explanation Answer: B) pure virtual function

Explanation:

Classes that contain at least one pure virtual function are called as abstract base classes.

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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

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

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; }

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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;
}