CS304 FINALTERM PAPERS 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



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 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”<}


};
class c2: public c1{
public:
void function(){
cout<<”I am in c2”<
}

};
class c3: public c1 {
public:
void function(){
cout<<”I am in c3”<}

};

int main(){

c1 * test1 = new c2();
c1 * test2 = new c3();
test1->function();
test2->function();
system(“PAUSE”);
return 0;
}

Answer: I am in c2
I am in c3

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

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
void Test(U);
template< class T >

class B {
int data;
public:
friend void Test<>( T );
};

template
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.