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CS304 Unsolved Final Term Paper Spring 2010

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.

 

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

 

► 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.

 

►  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();

}

 

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 { … … };

 

► 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>

 

 

 

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,

 

► 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?

 

► 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

► 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.

 

► 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?

 

 

► 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?

 

 

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;

}

 

 

 

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){

}

}

};

 

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)

{

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;

}

 

 

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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