CS304 Unsolved Mid term papers by Arslan Ali and Zeeshan Fall2010

CS304 MID FALL 2010

 

We can get only one unique value which can be used by all the objects of that class by the use of,

 

static variables

dynamic variables

instance variables

data members

 

 

A member function having the same name as that of a class and a ~ sign with it is called,

 

Constructor

Getter

Setter

Destructor

 

 

Using encapsulation we can achieve

Information hiding

Least interdependencies among modules

Implementation independence

All of given options

 

Inheritance is a way to

 

make general classes into more specific classes.

pass arguments to objects of classes.

improve data hiding and encapsulation.

providing class growth through natural selection.

 

Static variable can be initialized more than once.

True

False

 

For classes with common behavior, you can save effort by placing the common behavior in a __________.

Derived Class

Base class

Deprived Class

Named class

Which of the following are an advantage of OOP?

 

OOP makes it easy to re-use the code

It provides an ability to create one user defined data type by extending the other

It provides the facility of defining Abstract data types through which real world entities can be defined better

All of the given options

 

 

 

The >= operator can be overloaded.

 

True

False

 

 

 

A static member function cannot be declared.

Static

Implicit

Explicit

Virtual

 

 

Static variables act like a global variable in the context or scope of the class.

 

True

False

 

The compiler won’t object if you overload the * operator to perform division.

 

 

True

False

 

We can use “this” pointer in the constructor in the body and even in the initialization list of any class if we are careful,

 

TRUE

False

 

 

 

A C++ class is similar to ——————–

 

Structure

Header File

Library File

None of the given

 

 

 

 

Which operator can not be overloaded?

The relation operator ( >= )

Assignment operator ( = )

Script operator ( [] )

Conditional operator (? : )

 

 

 

An overloaded operator always requires one less argument than its number of operands.

True

False

A generalization-specialization relation between classes are implemented using

 

data hiding

friend classes

encapsulation

inheritance

 

 

 

In OOP  a  class is an example of _____

Data Type

Abstract Type

User Defined Type

None of the given

 

Identify which of the following overloaded operator function’s declaration is appropriate for the given call?

Rational_number_1 + 2.325

Where Rational_number_1 is an object of user defined class Rational_number.

Rational_number operator+( Rational_number & obj);

Rational_number operator+(double& obj);

Rational_number operator+(Rational_number &obj, double& num);

operator+(double& obj);

 

 

A class can be identified from a statement by ————-

Noun

Pronoun

Verb

Adverb

 

 

 

 

The members of a class that can be accessed without creating the object of the class is called

 

Private member

Data Member

Public Member

Static

 

 

 

 

Q.

What is difference between simple association and composition?

 

Q.

Friend functions minimize “Encapsulation”, What is your opinion?

 

Q.

Write three important properties of constructors?

1. Tell the reason why we can not overload the following four operators in c++

.    ,      .*    ,       ::          ,         ?:

1. Considering the complex number class can we subtract two complex numbers by overloading plus “+ “Operator. Justify your answer as well.

 

 

Q.

How we resolve the following problems in overloading of assignment operator in string class, (explain with the help of c++ code)

 

1. Self referencing
2. Assigning a string value to more than one strings in a single line like, stringobject1 = string object2 = stringobject3 = stringobject4

 

Q.

Consider the class given below explain the order in which variables x,y and z will be initialized after creating object of this class,

 

class XYZ{

int e;

int f;

int g;

public:

XYZ ();

};

 

XYZ:: XYZ ():g(30),e(10),f(20)

{

…

}