CS304- Object Oriented Programming Complete Solved Midterm Paper

MIDTERM  EXAMINATION

Spring 2010

CS304- Object Oriented Programming (Session - 6)

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

Suppose there is an object of type Person, which of the following can be considered as one of its attributes

       ► Name       ► Age       ► Work()       ► Both Name and Age

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

What a derived class can add?

       ► New data members       ► New member functions and New friend functions

       ► New constructors and destructor       ► All of given

   

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

________ is/are used to access information hidden within an object?

       ► Interface       ► Private data members       ► Private member functions

       ► Both public and private members

   

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

this pointers are not accessible for static member functions.

       ► True       ► False

   

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

A static member function cannot be declared.

       ► Static       ► Implicit       ► Explicit       ► Virtual

   

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

C++ compiler does not allow to dynamically allocate memory for objects

       ► False       ► True

   

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

Given the following class

class Base{

        int Age=33;

}

How you can improve above class with respect to accessing the field Age?

       ► Define the variable Age as private       ► Define the variable Age as protected

       ► Define the variable Age as private and create a get method that returns it and a set method that updates it
       ► Define the variable Age as protected and create a set method that returns it and a get method that updates it

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

Friend class and friend function can be used as an alternate to each other

       ► True       ► False

   

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

Which of the following operators always takes no argument if overloaded?

       ► /       ► -       ► +       ► ++

   

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

Suppose that the Test class does not have an overloaded assignment operator. What happens when an assignment a=b; is given for two Test objects a and b?

       ► The automatic assignment operator is used

       ► The copy constructor is used        ► Compiler error        ► Run-time error

   

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

Assume a class C with objects obj1, obj2, and obj3. For the statement obj3 = obj1 - obj2 to work correctly, if the overloaded - operator must

       ► take two arguments.        ► return a value.        ► create a named temporary object.

       ► take four arguments

   

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

Which operator can not be overloaded?

       ► The relation operator ( >= )       ► Assignment operator ( = )

       ► Script operator ( [] )       ► Conditional operator (? : )

   

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

We achieve independence of internal implementation from its external interface through-----------

       ► Encapsulation       ► Information Hiding       ► Abstraction

       ► both encapsulation and information hiding

   

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

Which one of the following is not an object association?

       ► Simple Assocation       ► Inheritance       ► Aggregation       ► Composition

   

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

We capture the object attributes and behavior in Object Oriented programming using---------------

       ► Class       ► Function       ► Data Members       ► Instances

   

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

The return type of a constructor is of  -------------

       ► Integer       ► Chracter       ► Double       ► No type

   

Question No: 17    ( Marks: 2 )

Can we create an array of objects for a class having default constructor?. Justify your answer.

Ans:

Question No: 18    ( Marks: 2 )

Friend functions increase ‘Data vulnerability’, what is your opinion ?

Question No: 19    ( Marks: 2 )

Explain two benefits of setter functions.

    Question No: 20    ( Marks: 3 )

Consider the class given below what will be the values in variables x,y and z after creating object of this class,

class ABC{

            int x;

            int y;

            int z;

public:

            ABC();

};

ABC::ABC():x(10),z(x),y(x)

{

            …

}

   

Question No: 21    ( Marks: 3 )

Explain what type of copy the default assignment operator "=" does when applied to objects. (shallow copy or deep copy)

   

Question No: 22    ( Marks: 5 )

 What is composition? Explain it with the help of an example.

   

Question No: 23    ( Marks: 5 )

 How we can overload Stream Extraction and Insertion Operators in c++?Give example code for Complex Number Class.

Class is not a mechanism to create objects and define user data types.

True  false

Memory is allocated to non static members only, when:

 Class is created           Object is defined         Object is initialized      

Object is created

The sub-object’s life is not dependent on the life of master class in ___________.

Composition  Aggregation  Separation  non of the given

Unary operators and assignment operator are right associative.

true          false

The >= operator can't be overloaded.

True          false

_____ is creating objects of one class inside another class.

 Association          Composition         Aggregation            Inheritance

If we are create array of objects through new operator, then

 We can call overloaded constructor through new

 We can’t call overloaded constructor through new

 We can call default constructor through new

 None of the given

Object can be declared constant with the use of Constant keyword.

True          false

__________ Operator will take only one operand.

New          int     object        none of the given

 Which of the following operator(s) take(s) one or no argument if overloaded?

++           *              %             All of the given choices

this pointer does not pass implicitly to __________ functions.

Static Member                 Non-Static Member         Instance Number   None of the given

Operator overloading is

making C++ operators work with objects. giving C++ operators more than they can handle.

giving new meanings to existing Class members.     making new C++ operators