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Thread: CS304 final term current paper spring Jily 2011

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    CS304 Question No: 1 ( m a r k s: 1 )

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



    CS304 Question No: 2 ( m a r k s: 1 )

    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

    CS304 Question No: 3 ( m a r k s: 1 )

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



    CS304 Question No: 4 ( m a r k s: 1 )

    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.

    CS304 Question No: 5 ( m a r k s: 1 )

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




    ►As many as necessary.

    CS304 Question No: 6 ( m a r k s: 1 )

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


    ►One specific

    ►All instances of one date type

    ►None of the given options

    CS304 Question No: 7 ( m a r k s: 1 )

    Template functions use _________ than ordinary functions.

    ►Greater Memory

    ►Lesser Memory

    ►Equal Memory

    ►None of the given options

    CS304 Question No: 8 ( m a r k s: 1 )

    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.

    CS304 Question No: 9 ( m a r k s: 1 )

    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.

    CS304 Question No: 10 ( m a r k s: 1 )

    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.

    CS304 Question No: 11 ( m a r k s: 1 )

    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.

    CS304 Question No: 12 ( m a r k s: 1 )

    class DocElement



    virtual void Print() { cout <



    class Heading : public DocElement



    void Print() { cout <



    class Paragraph : public DocElement



    void Print() { cout <



    void main()


    DocElement * p = new Paragraph();



    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.

    CS304 Question No: 13 ( m a r k s: 1 )

    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

    CS304 Question No: 14 ( m a r k s: 1 )

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




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

    ►class class-name()

    class template


    CS304 Question No: 15 ( m a r k s: 1 )

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



    CS304 Question No: 16 ( m a r k s: 1 )

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




    ►All of given

    CS304 Question No: 17 ( m a r k s: 1 )

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

    ►data type

    ►meta type

    ►virtual type

    ►pointer type

    CS304 Question No: 18 ( m a r k s: 1 )

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




    ►None of given

    CS304 Question No: 19 ( m a r k s: 1 )

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



    ►Unique identity

    ►All of the given

    CS304 Question No: 20 ( m a r k s: 1 )

    Consider the following statement

    Cupboard has books

    What is the relationship between Cupboard and books?




    ►None of the given options

    CS304 Question No: 21 ( m a r k s: 1 )

    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.

    CS304 Question No: 22 ( m a r k s: 1 )

    ___________, 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

    CS304 Question No: 23 ( m a r k s: 1 )

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



    CS304 Question No: 24 ( m a r k s: 1 )

    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?



    ►Both Rational_number_1 & Rational_number_2

    ►any of the two objects, randomly

    CS304 Question No: 25 ( m a r k s: 1 )

    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

    CS304 Question No: 26 ( m a r k s: 1 )

    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





    CS304 Question No: 27 ( m a r k s: 2 )

    Give two uses of a destructor.

    CS304 Question No: 28 ( m a r k s: 2 )

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

    CS304 Question No: 29 ( m a r k s: 2 )

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

    CS304 Question No: 30 ( m a r k s: 2 )

    State any conflict that may rise due to multiple inheritance?

    CS304 Question No: 31 ( m a r k s: 3 )

    What will be the output after executing the following code?

    class c1{


    virtual void function(){





    class c2: public c1{


    void function(){





    class c3: public c1 {


    void function(){





    int main(){

    c1 * test1 = new c2();

    c1 * test2 = new c3();




    return 0;


    CS304 Question No: 32 ( m a r k s: 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.

    CS304 Question No: 33 ( m a r k s: 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{


    int function1(){


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

    throw exception();


    return 0;


    catch(Exception e){





    CS304 Question No: 34 ( m a r k s: 5 )

    What is the output produced by the following program?


    void sample_function(double test) throw (int);

    int main()




    cout <<”trying.\n”;



    cout <





    cout <



    cout <


    return 0;


    void sample_function(double test) throw (int)


    cout <


    if(test < 100)

    throw 42;


    CS304 Question No: 35 ( m a r k s: 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.


    void Test(U);


    class B {

    int data;


    friend void Test( T );



    void Test(U u){

    B b1;

    b1.data = 7;


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


    char i;



    return 0;


    CS304 Question No: 36 ( m a r k s: 5 )

    Consider the following class,

    class Base


    char * p;


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

    ~Base() { delete [] p; }


    class Derived : public Base


    char * q;


    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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