Complete Final term Paper Of CS304- Object Oriented Programming

FINALTERM  EXAMINATION

Spring 2010

CS304- Object Oriented Programming (Session - 4)

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Question No: 1    ( Marks: 1 )    - Please choose one

 Classes like TwoDimensionalShape and ThreeDimensionalShape would normally be concrete, while classes like Sphere and Cube would normally be abstract.

       ► True

       ► False

   

Question No: 2    ( Marks: 1 )    - Please choose one

 Virtual functions allow you to

       ► create an array of type pointer-to-base class that can hold pointers to derived classes.

       ► create functions that can never be accessed.

       ► group objects of different classes so they can all be accessed by the same function code.

       ► use the same function call to execute member functions of objects from different classes

   

Question No: 3    ( Marks: 1 )    - Please choose one

 A pointer to a base class can point to objects of a derived class.

           

       ► True

       ► False

   

Question No: 4    ( Marks: 1 )    - Please choose one

 A copy constructor is invoked when

       ► a function do not returns by value.

       ► an argument is passed by value.

       ► a function returns by reference.

       ► an argument is passed by reference.

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Question No: 5    ( Marks: 1 )    - Please choose one

 Each try block can have ______ no. of catch blocks.

       ► 1

       ► 2

       ► 3

       ► As many as necessary.

   

Question No: 6    ( Marks: 1 )    - Please choose one

 Non Template Friend functions of a class are friends of ________instance/s of that class.

       ► All

       ► One specific

       ► All instances of one date type

       ► None of the given options

   

Question No: 7    ( Marks: 1 )    - Please choose one

 Template functions use _________ than ordinary functions.

       ► Greater Memory

       ► Lesser Memory

       ► Equal Memory

       ► None of the given options

           

   

Question No: 8    ( Marks: 1 )    - Please choose one

 The find() algorithm

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       ► finds matching sequences of elements in two containers.

       ► finds a container that matches a specified container.

       ► takes iterators as its first two arguments.

       ► takes container elements as its first two arguments.

   

Question No: 9    ( Marks: 1 )    - Please choose one

 The copy() algorithm returns an iterator to

       ► the last element copied from.

       ► the last element copied to.

       ► the element one past the last element copied from.

       ► the element one past the last element copied to.

   

Question No: 10    ( Marks: 1 )    - Please choose one

 If you define a vector v with the default constructor, and define another vector w with a one-argument constructor to a size of 11, and insert 3 elements into each of these vectors with push_back(), then the size() member function will return ______ for v and _____ for w.

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       ►  11 for v and 3 for w.

       ► 0 for v and 0 for w.

       ► 0 for v and 3 for w.

       ►  3 for v and 11 for w.

   

Question No: 11    ( Marks: 1 )    - Please choose one

 Which is not the Advantage of inheritance?

       ► providing class growth through natural selection.

       ► facilitating class libraries.

       ► avoiding the rewriting of code.

       ► providing a useful conceptual framework.

   

Question No: 12    ( Marks: 1 )    - Please choose one

 class DocElement

{

public:

      virtual void Print() { cout << "Generic element"; }

};

class Heading : public DocElement

{

public:

      void Print() { cout << "Heading element"; }

};

class Paragraph : public DocElement

{

public:

      void Print() { cout << "Paragraph element"; }

};

void main()

{

      DocElement * p = new Paragraph();

      p->Print();

}

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When you run this program, it will print out a single line to the console output.

What will be in that line?

Select one correct answer from the following list:

       ► Generic element

       ► Heading element

       ► Paragraph element

       ► Nothing will be printed.

   

Question No: 13    ( Marks: 1 )    - Please choose one

 Which type of inheritance is being represented by the following statement,

class X : public A, public B { ... ... };

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       ► Single inheritance

       ► Multiple inheritance

       ► Double inheritance

       ► None of the given options

   

Question No: 14    ( Marks: 1 )    - Please choose one

 When we write a class template the first line must be:

       ► template < class class_name>

       ► template < class data_type>

       ► template < class T >

Here T can be replaced with any name but it is preferable.

       ► class class-name()

class template<class_name>

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Question No: 15    ( Marks: 1 )    - Please choose one

 Function templates should be used where code and behavior must be identical.

       ► True

       ► False

   

Question No: 16    ( Marks: 1 )    - Please choose one

 Which of the following is/are advantage[s] of generic programming?

       ► Reusability

       ► Writability

       ► Maintainability

       ► All of given

   

Question No: 17    ( Marks: 1 )    - Please choose one

 The specialization pattern <T*> after the name says that this specialization is to be used for every,

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       ► data type

       ► meta type

       ► virtual type

       ► pointer type

   

Question No: 18    ( Marks: 1 )    - Please choose one

 A range is often supplied to an algorithm by two _______ values.

       ► italic

       ► iteration

       ► iterator

       ► None of given

   

Question No: 19    ( Marks: 1 )    - Please choose one

 Which of the following is an integral part of an object?

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       ► State

       ► Behavior

       ► Unique identity

       ► All of the given

   

Question No: 20    ( Marks: 1 )    - Please choose one

 Consider the following statement

Cupboard has books

What is the relationship between Cupboard and books?

       ► Composition

       ► Aggregation

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       ► Inheritance

       ► None of the given options

   

Question No: 21    ( Marks: 1 )    - Please choose one

 Which sentence clearly defines an object?

       ► one instance of a class.

       ► another word for a class.

       ► a class with static methods.

       ► a method that accesses class attributes.

   

Question No: 22    ( Marks: 1 )    - Please choose one

 ___________, which means if A declares B as its friend it does NOT mean that A can access private data of B. It only means that B can access all data of A.

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       ► Friendship is one way only

       ► Friendship is two way only

       ► NO Friendship between classes

       ► Any kind of friendship

   

Question No: 23    ( Marks: 1 )    - Please choose one

 The statement objA=objB; will cause a compiler error if the objects are of different classes.

       ► True

       ► False

   

Question No: 24    ( Marks: 1 )    - Please choose one

 Consider the call given below of an overloaded operator "+",

Rational_number_1 + Rational_number_2

Where Rational_number_1 and Rational_number_2 are the two objects of Rational_number class (a user defined class). Identify which of the above two objects will be passed as an argument to the overloaded operator function?

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       ► Rational_number_1

       ► Rational_number_2

       ► Both Rational_number_1 & Rational_number_2

       ► any of the two objects, randomly

   

Question No: 25    ( Marks: 1 )    - Please choose one

 If a class D has been derived using protected inheritance from class B (If B is a protected base and D is derived class) then public and protected members of B -------- accessed by member functions and friends of class D and classes derived from D

       ► can be

       ► cannot be

       ► does restirct to be

       ► not given

   

Question No: 26    ( Marks: 1 )    - Please choose one

 In Private --------------  only member functions and friend classes or functions of a derived class can convert pointer or reference of derived object to that of parent object

       ► specialization

       ► inheritance

       ► abstraction

       ► composition

   

Question No: 27    ( Marks: 2 )

 Give two uses of a destructor.

   

Question No: 28    ( Marks: 2 )

 Describe the way to declare a template class as a friend class of any other class.

   

Question No: 29    ( Marks: 2 )

 Give the name of two basic types of containers collectively called First class containers?

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Question No: 30    ( Marks: 2 )

 State any conflict that may rise due to multiple inheritance?

   

Question No: 31    ( Marks: 3 )

 What will be the output after executing the following code?

class c1{

public:

virtual void function(){

cout<<”I am in c1”<<endl;

}

};

class c2: public c1{

public:

void function(){

cout<<”I am in c2”<<endl;

}

};

class c3: public c1 {

public:

void function(){

cout<<”I am in c3”<<endl;

}

};

int main(){

c1 * test1 = new c2();

c1 * test2 = new c3();

test1->function();

test2->function();

system(“PAUSE”);

return 0;

}

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Question No: 32    ( Marks: 3 )

 If we declare a function as friend of a template class will it be a friend for a particular data type or for all data types of that class.

   

Question No: 33    ( Marks: 3 )

 Tell the logical error/s in the code given below with reference to resource management; also describe how we can correct that error/s.

class Test{

public:

int function1(){

                        try{

                                FILE *fileptr = fopen(“filename.txt”,“w”);

                                 throw exception();

                                 fclose(fileptr);

                                 return 0;

                                 }

                                 catch(Exception e){

                                 ...

                                 }

}

};

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Question No: 34    ( Marks: 5 )

 What is the output produced by the following program?

#include<iostream.h>

void sample_function(double test) throw (int);

int main()

{

            try

            {

                        cout <<”Trying.\n”;

                        sample_function(98.6);

                        cout << “Trying after call.\n”;

            }

            catch(int)

            {

                        cout << “Catching.\n”;

            }

           

            cout << “End program.\n”;

            return 0;

}

void sample_function(double test) throw (int)

{

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            cout << “Starting sample_function.\n”;

            if(test < 100)

               throw 42;

}

   

Question No: 35    ( Marks: 5 )

 The code given below has one template function as a friend of a template class,

1.      You have to identify any error/s in this code and describe the reason for error/s.

2.      Give the correct code after removing the error/s.

template<typename U>

void Test(U);

template< class T >

class B {

            int data;

            public:

            friend void Test<>( T );

};

template<typename U>

void Test(U u){

    B < int> b1;

    b1.data = 7;

    }

int main(int argc, char *argv[])

{

    char i;

    Test(i);

    system("PAUSE");           

    return 0;

}

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Question No: 36    ( Marks: 5 )

 Consider the following class,

class Base

{

            char * p;

public:

            Base() { p = new char[10]; }

            ~Base() { delete [] p; }

};

class Derived : public Base

{

            char * q;

public:

            Derived() { q = new char[20]; }

            ~Derived() { delete [] q; }

};

void foo()

{

            Base* p = new Derived();

            delete p;

}

With this program, every time function foo is called, some memory will leak.

Explain why memory will leak. Also, explain how to fix this problem.

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