Deck 13: Introduction to Classes

Question 1

This type of member function may be called only from a function that is a member of the same class.

A) public
B) private
C) global
D) local
E) None of these

Answer 1

B

Question 2

This type of member function may be called from a statement outside the class.

A) public
B) private
C) undeclared
D) global
E) None of these

Answer 2

A

Question 3

Objects are created from abstract data types that encapsulate _______ and _______ together.

A) numbers, characters
B) data, functions
C) addresses, pointers
D) integers, floats
E) None of these

Answer 3

B

Question 4

Class declarations are usually stored here.

A) On separate disk volumes
B) In their own header files
C) In .cpp files, along with function definitions
D) Under pseudonyms
E) None of these

Question 5

Members of a class object are accessed with the

A) dot operator.
B) cin object.
C) extraction operator.
D) stream insertion operator.
E) None of these

Question 6

When you dereference an object pointer, use the

A) -> operator
B) <> operator
C) dot operator
D) & operator
E) None of these

Question 7

This directive is used to create an "include guard," which allows a program to be conditionally compiled. This prevents a header file from accidentally being included more than once.

A) #include
B) #guard
C) #ifndef
D) #endif
E) None of these

Question 8

A C++ class is similar to one of these.

A) inline function
B) header file
C) library function
D) structure
E) None of these

Question 9

A ___________ is a member function that is automatically called when a class object is ___________.

A) destructor, created
B) constructor, created
C) static function, deallocated
D) utility function, declared
E) None of these

Question 10

When a constructor function accepts no arguments, or does not have to accept arguments because of default arguments, it is called a(n):

A) empty constructor
B) default constructor
C) stand-alone function
D) arbitrator function
E) None of these

Question 11

Assuming that Rectangle is a class name, the statement Rectangle *BoxPtr;

A) declares an object of class Rectangle
B) assigns the value of *BoxPtr to the object Rectangle
C) defines a Rectangle pointer variable called BoxPtr
D) is illegal in C++
E) None of these

Question 12

In OOP terminology, an object's member variables are often called its _________, and its member functions are sometimes referred to as its behaviors, or ____________.

A) values, morals
B) data, activities
C) attributes, activities
D) attributes, methods
E) None of these

Question 13

A class is a(n) _____________ that is defined by the programmer.

A) data type
B) function
C) method
D) attribute
E) None of these

Question 14

When the body of a member function is defined inside a class declaration, it is said to be

A) static
B) globally
C) inline
D) conditionally
E) None of these

Question 15

If you do not declare an access specification, the default for members of a class is

A) inline
B) private
C) public
D) global
E) None of these

Question 16

The constructor function's return type is

A) int
B) float
C) char
D) structure pointer
E) None of these

Question 17

The destructor function's return type is:

A) tilde
B) int
C) float
D) nothing. Destructors have no return type.
E) None of the above.

Question 18

Examples of access specifiers are the keywords:

A) near and far
B) opened and closed
C) private and public
D) table and row
E) None of these

Question 19

This is used to protect important data.

A) public access specifier
B) private access specifier
C) protect() member function
D) class protection operator, @
E) None of these

Question 20

In a procedural program, you typically have __________stored in a collection of variables, and a set of __________ that perform operations on the data.

A) numbers, arguments
B) parameters, arguments
C) strings, operators
D) data, functions
E) None of these

Question 21

For the following code, which statement is not true? class Point
{
Private:
Double y;
Double z;
Public:
Double x;
};

A) x is available to code that is written outside the class.
B) The name of the class is Point.
C) x, y, and z are called members of the class.
D) z is available to code that is written outside the class.

Question 22

The constructor function always has the same name as

A) the first private data member
B) the first public data member
C) the class
D) the first object of the class
E) None of these

Question 23

What is the output of the following program? #include
Using namespace std;
Class TestClass
{
Public:
TestClass(int x)
{ cout << x << endl; }
TestClass()
{ cout << "Hello!" << endl; }
};
Int main()
{
TestClass test;
Return 0;
}

A) The program runs, but with no output.
B) 0
C) Hello!
D) The program will not compile.

Question 24

More than one constructor function may be defined for a class.

Question 25

What is the output of the following program? #include
Using namespace std;
Class TestClass
{
Private:
Int val;
Void showVal()
{ cout << val << endl; }
Public:
TestClass(int x)
{ val = x; }
};
Int main()
{
TestClass test(77);
Test.showVal();
Return 0;
}

A) The program runs, but with no output.
B) 77
C) 0
D) The program will not compile.

Question 26

This is automatically called when an object is destroyed.

A) constructor function
B) specification deallocator
C) destructor function
D) coroner function
E) None of these

Question 27

The process of object-oriented analysis can be viewed as the following steps:

A) Identify objects, then define objects' attributes, behaviors, and relationships
B) Define data members and member functions, then assign a class name
C) Declare private and public variables, prototype functions, then write code
D) Write the main() function, then determine which classes are needed
E) None of these

Question 28

More than one destructor function may be defined for a class.

Question 29

You must declare all data members of a class before you declare member functions.

Question 30

What is the output of the following program? #include
Using namespace std;
Class TestClass
{
Public:
TestClass(int x)
{ cout << x << endl; }
TestClass()
{ cout << "Hello!" << endl; }
};
Int main()
{
TestClass test(77);
Return 0;
}

A) The program runs, but with no output.
B) 77
C) Hello!
D) The program will not compile.

Question 31

Object-oriented programming is centered around the object, which encapsulate together both the data and the functions that operate on the data.

Question 32

Whereas object-oriented programming centers around the object, procedural programming centers around functions.

Question 33

Class objects can be defined prior to the class declaration.

Question 34

If a local variable and a global variable have the same name within the same program, the _______ resolution operator must be used.

A) variable
B) ambiguity
C) scope
D) global
E) None of these

Question 35

The constructor function may not accept arguments.

Question 36

Assume that myCar is an instance of the Car class, and that the Car class has a member function named accelerate. Which of the following is a valid call to the accelerate member function?

A) Car->accelerate();
B) myCar::accelerate();
C) myCar.accelerate();
D) myCar:accelerate();

Question 37

When a member function is defined outside of the class declaration, the function name must be qualified with the:

A) class name, followed by a semicolon
B) class name, followed by the scope resolution operator
C) name of the first object
D) private access specifier
E) None of these

Question 38

A class may have this many default constructor(s).

A) only one
B) more than one
C) a maximum of two
D) any number of
E) None of these

Question 39

Objects in an array are accessed with ________, just like any other data type in an array.

A) subscripts
B) parentheses
C) #include statements
D) output format manipulators
E) None of these

Question 40

A destructor function can have zero to many parameters.

Question 41

A private member function is useful for tasks that are internal to the class, but is not directly called by statements outside the class.

Question 42

One purpose that destructor functions are often used for is to free memory that was allocated by the object.

Question 43

You must use the private access specification for all data members of a class.

Question 44

If you do not declare a destructor function, the compiler will furnish one automatically.

Question 45

When an object is defined without an argument list for its constructor, the compiler automatically calls the object's default constructor.

Question 46

One purpose that constructor functions are often used for is to allocate memory that will be needed by the object.