CS304 Midterm Online Quiz

CS304-Midterm

1 / 50

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

2 / 50

Which operator can not be overloaded?

Assignment operator ( = )

Script operator ( [] )

The relation operator ( >= )

Conditional operator (? : )

3 / 50

Constant objects cannot change their state,

TRUE

FALSE

4 / 50

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 protected

Define the variable Age as private

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

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

5 / 50

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

Age

Work()

Name

Both Name and Age

6 / 50

The >= operator can be overloaded

FALSE

TRUE

7 / 50

Friend functions are _____________ functions of a class

None of given

data member

object member

non-member

8 / 50

Which one of the following features of OOP is used to derive a class from another?

Encapsulation

Polymorphism

Data hiding

Inheritance

9 / 50

this pointers are not accessible for static member functions

TRUE

FALSE

10 / 50

this pointers are not accessible for static member functions

FALSE

TRUE

11 / 50

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 copy constructor is used

Compiler error

Run-time error

The automatic assignment operator is used

12 / 50

The life of sub object is not dependant on the life of master class in ___________

Composition

None of the given

Separation

Aggregation

13 / 50

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

Setter

Destructor

Constructor

Getter

14 / 50

Static variable can be initialized more than once

TRUE

FALSE

15 / 50

Which one of the following terms best represents the statement given below, ” Hiding details of an object from the other parts of a program”

Compilation

Obfustication

Encapsulation

Data Mining

16 / 50

The >= operator can be overloaded

TRUE

FALSE

17 / 50

A static member function cannot be declared

Static

Virtual

Implicit

Explicit

18 / 50

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

Double

Chracter

Integer

19 / 50

Which one of the following is not an object association?

Simple Assocation

Composition

Inheritance

Aggregation

20 / 50

Which of the following is the best approach if it is required to have more than one functions having exactly same functionality and implemented on different data types?

Templates

Data hiding

Overloading

Encapsulation

21 / 50

A static member function cannot be declared

Implicit

Virtual

Explicit

22 / 50

Inheritance is a way to - Please choose one

make general classes into more specific classes.

improve data hiding and encapsulation

providing class growth through natural selection

pass arguments to objects of classes

23 / 50

Your chief Software designer has shown you a sketch of the new Computer parts system she is about to create. At the top of the hierarchy is a Class called Computer and under this are two child classes. One is called LinuxPC and one is called WindowsPC. The main difference between the two is that one runs the Linux operating System and the other runs the Windows System (of course another difference is that one needs constant re-booting and the other runs reliably). Under the WindowsPC are two Sub classes one called Server and one Called Workstation. How might you appraise your designers work?

Ask for a re-design of the hierarchy with changing the Operating System to a field rather than

Ask for the option of WindowsPC to be removed as it will soon be obsolete

Give the goahead for further design using the current scheme

Change the hierarchy to remove the need for the superfluous Computer Class

24 / 50

A generalization-specialization relation between classes are implemented using

data hiding

friend classes

encapsulation

inheritance

25 / 50

If there is a pointer p to objects of a base class, and it contains the address of an object of a derived class, and both classes contain a nonvirtual member function, ding(), then the statement p->ding(); will cause the version of ding() in the _____ class to be executed

Base

Abstract

Derived

virtual

26 / 50

Which operator can not be overloaded?

Assignment operator ( = )

Script operator ( [] )

The relation operator ( >= )

Conditional operator (? : )

27 / 50

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

FALSE

TRUE

28 / 50

The ________ relationship indicates that an object contains other objects

‘is-a’

‘be-

‘has-a’

None of given

29 / 50

What is true about function templates?

The compiler generates only one copy of the function template

The compiler can only generate copy for the int type data

None of the given

The compiler generates a copy of function respective to each type of data

30 / 50

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

FALSE

TRUE

31 / 50

What a derived class can add?

New constructors and destructor

New member functions and New friend functions

All of given

New data members

32 / 50

Suppose you have been given the following design, "A person has a name, age, address and sex. You are designing a class to represent a type of person called a patient. This kind of person may be given a diagnosis, have a spouse and may be alive". Given that the person class has already been created, what of the following would be appropriate to include when you design the patient class?

sex and diagnosis

diagnosis and age

age and sex

registration date and diagnosis

33 / 50

In object orientated programming, a class of objects cans _____________ properties from another class of objects

Adopt

Borrow

Utilize

Inherit

34 / 50

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

Derived Class

Base class

Named class

Deprived Class

35 / 50

What a derived class can add?

New member functions and New friend functions

New data members

All of given

New constructors and destructor

36 / 50

Which one is not keyword in C++?

None of given

B_op

const

operator

37 / 50

_______ is a relationship

abstraction

Inheritance

Polymarphism

encapsulation

38 / 50

_______ remain in memory even when all objects of a class have been destroyed

Static variables

Instance variable

None of given

Primitive variables

39 / 50

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

FALSE

TRUE

40 / 50

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+(double& obj);

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

Rational_number operator+( Rational_number & obj);

operator+(double& obj);

41 / 50

Consider the code below, class Fred { public: Fred(); ... }; int main() { Fred a[10]; Fred* p = new Fred[10]; ... } Select the best option,

Fred a[10]; calls the default constructor 11 times Fred* p = new Fred[10]; calls the default constructor 11 times

Fred a[10]; calls the default constructor 09 times Fred* p = new Fred[10]; calls the default constructor 10 times

Produce an error

Fred a[10]; calls the default constructor 10 times Fred* p = new Fred[10]; calls the default constructor 10 times

42 / 50

this pointers are not accessible for static member functions

FALSE

TRUE

43 / 50

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 and create a get method that returns it and a set method that updates it

Define the variable Age as protected

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

Define the variable Age as private

44 / 50

The find() algorithm

takes container elements as its first two arguments

finds a container that matches a specified container

finds matching sequences of elements in two containers

takes iterators as its first two arguments.

45 / 50

The process of hiding unwanted details from users is called __________

Abstraction

Encapsulation

Argumentation

Protection

46 / 50

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

return a value

take four arguments

take two arguments

create a named temporary object

47 / 50

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

instance variables

dynamic variables

static variables

data members

48 / 50

Which operator can not be overloaded?

The relation operator ( >= )

Script operator ( [] )

Conditional operator (? : )

Assignment operator ( = )

49 / 50

Static variable can be initialized more than once.

TRUE

FALSE

50 / 50

A generic class showing all the common attributes and a behavior of other classes represents a very important feature in oop called --------

Polymarphism

Inheritance

Encapsulation

Abstraction

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