Deck 13: Introduction to Classes

Question 1

A destructor function can have zero to many parameters.

Answer 1

False

Question 2

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

Answer 2

True

Question 3

Constructor functions are often used to allocate memory that will be needed by the object.

Answer 3

True

Question 4

While a class's member functions may be overloaded, the constructor cannot be overloaded.

Question 5

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

Question 6

In OOP terminology, an object's member variables are often called its __________ and its member functions can be referred to as its behaviors or its __________.

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

Question 7

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

Question 8

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

Question 9

Class objects can be defined prior to the class declaration.

Question 10

In object-oriented programming, the object encapsulates both the data and the functions that operate on the data.

Question 11

In-place member initialization no longer is available in C++11.

Question 12

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

Question 13

The constructor function may not accept arguments.

Question 14

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

Question 15

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

Question 16

Destructor functions are often used to free memory that was allocated by the object.

Question 17

You can use the technique known as a member intialization list to initialize members of a class.

Question 18

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

Question 19

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

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

Question 20

When using smart pointers to dynamically allocate objects in C++ 11, it is unnecessary to delete the dynamically allocated objects because the smart pointer will automatically delete them.

Question 21

When a constructor has a member initialization list, the initializations take place

A) after any statements in the body of the constructor execute
B) before any statements in the body of the constructor execute
C) when a member is used in the execution of the program
D) None of these

Question 22

Which type of member function may only be called from a function that is a member of the same class?

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

Question 23

In C++11 you can use __________ to initialize a member variable in its declaration statement.

A) general member initialization
B) default initialization
C) in-place initialization
D) initialization overload
E) None of these

Question 24

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 25

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

A) static
B) global
C) inline
D) conditional
E) None of these

Question 26

The type of member function that may be called from a statement outside the class is

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

Question 27

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 28

Where are class declarations usually stored?

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 29

Which of the following is used to protect important data?

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

Question 30

Members of the class object are accessed with the

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

Question 31

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

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

Question 32

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 33

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 34

The destructor function's return type is

A) int
B) float
C) char
D) Nothing; destructors have no return type
E) None of these

Question 35

Examples of access specifiers are the key words

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

Question 36

A C++ class is similar to a(n)

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

Question 37

Which of the following is a directive used to create an "include guard" that allows a program to be conditionally compiled to prevent a header file from accidentally being included more than once?

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

Question 38

Assuming that Rectangle is a class name, what can you say is true, given the following statement?
Rectangle *BoxPtr;

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

Question 39

When you dereference an object pointer, use the

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

Question 40

The constructor function's return type is

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

Question 41

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 not available to code that is written outside the class.
E) All of these are true.

Question 42

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 there is no output.
B) 77
C) Hello!
D) the program will not compile

Question 43

How many default constructors can a class have?

A) only one
B) two or more
C) only two
D) any number
E) None of these

Question 44

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 45

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 46

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

Question 47

The following code shows an example of __________ class Point
{
Private:
Double y = 5.70;
Double z = 3.0;
Public:
Public member functions go here...
};

A) constructor delegation
B) in-place initialization
C) a default constructor creation
D) an illegal initialization

Question 48

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 there is no output.
B) 77
C) 0
D) the program will not compile

Question 49

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 there is no output.
B) 0
C) Hello!
D) the program will not compile

Question 50

Which of the following is automatically called when an object is destroyed?

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

Question 51

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();
E) None of these

Question 52

Objects in an array are accessed with __________.

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

Question 53

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

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

Question 54

In C++11 you can have one constructor call another constructor in the same class by using

A) constructor delegation
B) in-place initialization
C) a member initialization list
D) None of these