FINALTERM EXAMINATION
Spring 2010
CS304- Object Oriented Programming
Spring 2010
CS304- Object Oriented Programming
CS304 - Object Oriented Programming - Q. No: 1
Classes like TwoDimensionalShape and ThreeDimensionalShape would normally be concrete, while classes like Sphere and Cube would normally be abstract.
True
False
CS304 - Object Oriented Programming - Q. No: 2
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
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 - Object Oriented Programming - Q. No: 3
A pointer to a base class can point to objects of a derived class.
True
False
A pointer to a base class can point to objects of a derived class.
True
False
CS304 - Object Oriented Programming - Q. No: 4
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.
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 - Object Oriented Programming - Q. No: 5
Each try block can have ______ no. of catch blocks.
1
2
3
As many as necessary.
Each try block can have ______ no. of catch blocks.
1
2
3
As many as necessary.
CS304 - Object Oriented Programming - Q. No: 6
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
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
CS304 - Object Oriented Programming - Q. No: 7
Template functions use _________ than ordinary functions.
Greater Memory
Lesser Memory
Equal Memory
None of the given options
CS304 - Object Oriented Programming - Q. No: 8
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.
Template functions use _________ than ordinary functions.
Greater Memory
Lesser Memory
Equal Memory
None of the given options
CS304 - Object Oriented Programming - Q. No: 8
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 - Object Oriented Programming - Q. No: 9
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.
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 - Object Oriented Programming - Q. No: 10
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.
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 - Object Oriented Programming - Q. No: 11
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.
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 - Object Oriented Programming - Q. No: 12
class DocElement
{
public:
virtual void Print() { cout <
<
};
class Heading : public DocElement
{
public:
void Print() { cout <
<
};
class Paragraph : public DocElement
{
public:
void Print() { cout <
<
};
void main()
{
DocElement * p = new Paragraph();
class DocElement
{
public:
virtual void Print() { cout <
<
};
class Heading : public DocElement
{
public:
void Print() { cout <
<
};
class Paragraph : public DocElement
{
public:
void Print() { cout <
<
};
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:
What will be in that line?
Select one correct answer from the following list:
Generic element
Heading element
Paragraph element
Nothing will be printed.
Heading element
Paragraph element
Nothing will be printed.
CS304 - Object Oriented Programming - Q. No: 13
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
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 - Object Oriented Programming - Q. No: 14
When we write a class template the first line must be:
template
template
template
Here T can be replaced with any name but it is preferable.
class class-name()
class template
<
When we write a class template the first line must be:
template
template
template
Here T can be replaced with any name but it is preferable.
class class-name()
class template
<
CS304 - Object Oriented Programming - Q. No: 15
Function templates should be used where code and behavior must be identical.
True
False
Rational
This will help us to standardized the codes.
They are meant for the situations where same functionality can be adapted to more than one type or class. It will reduce the need of repeating the entire code for each type.
They are meant for the situations where same functionality can be adapted to more than one type or class. It will reduce the need of repeating the entire code for each type.
CS304 - Object Oriented Programming - Q. No: 16
Which of the following is/are advantage[s] of generic programming?
Reusability
Writability
Maintainability
All of given
CS304 - Object Oriented Programming - Q. No: 17
The specialization pattern after the name says that this specialization is to be used for every,
data type
meta type
virtual type
pointer type
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 - Object Oriented Programming - Q. No: 18
A range is often supplied to an algorithm by two _______ values.
italic
iteration
iterator
None of given
A range is often supplied to an algorithm by two _______ values.
italic
iteration
iterator
None of given
CS304 - Object Oriented Programming - Q. No: 19
Which of the following is an integral part of an object?
State
Behavior
Unique identity
All of the given
Which of the following is an integral part of an object?
State
Behavior
Unique identity
All of the given
CS304 - Object Oriented Programming - Q. No: 20
Consider the following statement
Cupboard has books
What is the relationship between Cupboard and books?
Composition
Aggregation
Inheritance
None of the given options
Consider the following statement
Cupboard has books
What is the relationship between Cupboard and books?
Composition
Aggregation
Inheritance
None of the given options
CS304 - Object Oriented Programming - Q. No: 21
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.
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 - Object Oriented Programming - Q. No: 22
___________, 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
___________, 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 - Object Oriented Programming - Q. No: 23
The statement objA=objB; will cause a compiler error if the objects are of different classes.
True
False
The statement objA=objB; will cause a compiler error if the objects are of different classes.
True
False
CS304 - Object Oriented Programming - Q. No: 24
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
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
CS304 - Object Oriented Programming - Q. No: 25
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
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 - Object Oriented Programming - Q. No: 26
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
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
CS304 - Object Oriented Programming - Q. No: 27 ( m a r k s: 2 )
Give two uses of a destructor.
Give two uses of a destructor.
CS304 - Object Oriented Programming - Q. No: 28 ( m a r k s: 2 )
Descibe the way to declare a template class as a friend class of any other class.
Descibe the way to declare a template class as a friend class of any other class.
CS304 - Object Oriented Programming - Q. No: 29 ( m a r k s: 2 )
Give the name of two basic types of containers collectively called First class containers?
Give the name of two basic types of containers collectively called First class containers?
CS304 - Object Oriented Programming - Q. No: 30 ( m a r k s: 2 )
State any conflict that may rise due to multiple inheritance?
State any conflict that may rise due to multiple inheritance?
CS304 - Object Oriented Programming - Q. No: 31 ( m a r k s: 3 )
What will be the output after executing the following code?
What will be the output after executing the following code?
class c1{
public:
virtual void function(){
cout<
<
}
public:
virtual void function(){
cout<
<
}
};
class c2: public c1{
public:
void function(){
cout<
<
class c2: public c1{
public:
void function(){
cout<
<
}
};
class c3: public c1 {
public:
void function(){
cout<
<
}
class c3: public c1 {
public:
void function(){
cout<
<
}
};
int main(){
c1 * test1 = new c2();
c1 * test2 = new c3();
test1->function();
test2->function();
system(“PAUSE”);
return 0;
}
c1 * test2 = new c3();
test1->function();
test2->function();
system(“PAUSE”);
return 0;
}
CS304 - Object Oriented Programming - Q. 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.
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 - Object Oriented Programming - Q. 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.
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){
...
}
}
};
int function1(){
try{
FILE *fileptr = fopen(“filename.txt”,“w”);
throw exception();
fclose(fileptr);
return 0;
}
catch(Exception e){
...
}
}
};
CS304 - Object Oriented Programming - Q. No: 34 ( m a r k s: 5 )
What is the output produced by the following program?
What is the output produced by the following program?
#include
void sample_function(double test) throw (int);
int main()
{
try
{
cout <
<
sample_function(98.6);
cout <
<
}
catch(int)
{
cout <
<
}
{
try
{
cout <
<
sample_function(98.6);
cout <
<
}
catch(int)
{
cout <
<
}
cout <
<
return 0;
}
void sample_function(double test) throw (int)
{
cout <
<
if(test < 100)
throw 42;
}
<
return 0;
}
void sample_function(double test) throw (int)
{
cout <
<
if(test < 100)
throw 42;
}
CS304 - Object Oriented Programming - Q. 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.
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
void Test(U);
template
class B {
int data;
public:
friend void Test( T );
};
int data;
public:
friend void Test( T );
};
template
void Test(U u){
B b1;
b1.data = 7;
}
int main(int argc, char *argv[])
{
char i;
Test(i);
system("PAUSE");
return 0;
}
void Test(U u){
B b1;
b1.data = 7;
}
int main(int argc, char *argv[])
{
char i;
Test(i);
system("PAUSE");
return 0;
}
CS304 - Object Oriented Programming - Q. No: 36 ( m a r k s: 5 )
Consider the following class,
class Base
{
char * p;
public:
Base() { p = new char[10]; }
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]; }
};
class Derived : public Base
{
char * q;
public:
Derived() { q = new char[20]; }
~Derived() { delete [] q; }
};
void foo()
{
Base* p = new Derived();
};
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.
Explain why memory will leak. Also, explain how to fix this problem.
