Deck 14: More About Classes

Question 1

A non-static member function may not access a static member variable.

Answer 1

False

Question 2

The this pointer is a special built-in pointer that is automatically passed as a hidden argument to all non-static member functions.

Answer 2

True

Question 3

An aggregate class's constructor can use a member initialization list to call the constructors for each of its member objects.

Answer 3

True

Question 4

In C++ if you overload the < operator, you must also overload the > operator.

Question 5

By default, when an object is assigned to another object, each member of one object is copied to its counterpart in the other object.

Question 6

C++ permits you to overload the sizeof operator and the this pointer.

Question 7

A public data member may be declared a friend of a private function.

Question 8

When you overload an operator, you can change the operator's original meaning to something entirely different.

Question 9

In C++11 an rvalue reference is a reference variable that can refer only to temporary objects.

Question 10

It is possible to declare an entire class as a friend of another class.

Question 11

You may overload any C++ operator and you may use the operator function to define non-standard operations, such as @ or ^.

Question 12

A static member variable can be used when there are no objects of the class in existence.

Question 13

A static member function does not need to be called by a specific object of the class.

Question 14

You can overload the conditional operator to make it function as an unconditional operator.

Question 15

Each object of a class has its own copy of the class's

A) member functions
B) member variables
C) constructor and destructor functions
D) All of these
E) None of these

Question 16

When you overload the << operator you must also overload the >> operator.

Question 17

A move operation transfers resources from a source object to a target object.

Question 18

When a class declares an entire class as its friend, the friendship status is reciprocal. That is, each class's member functions have free access to the other's private members.

Question 19

If you overload the prefix ++ operator, the postfix ++ operator is automatically overloaded.

Question 20

The overloaded = operator copies data from one object to another so it is known as the overload copy operator.

Question 21

A good reason to overload an operator is to enable it to

A) outperform its C language counterparts
B) work in its usual way, but with programmer-defined data types
C) operate on more operands than in its standard definition
D) operate on no operands
E) None of these

Question 22

When objects contain pointers, it is a good idea to create an explicit __________ function.

A) destructor
B) copy constructor
C) static constructor
D) inline constructor
E) None of these

Question 23

C++ allows you to redefine the way __________ work when used with class objects.

A) compiler errors
B) preprocessor directives
C) standard operators
D) undefined variables
E) None of these

Question 24

C++ requires that a copy constructor's parameter be a(n)

A) integer data type
B) floating-point data type
C) pointer variable
D) reference object
E) None of these

Question 25

When you redefine the way a standard operator works when it is used with class objects, you have __________ the operator.

A) reassigned
B) reformatted
C) overloaded
D) referenced
E) None of these

Question 26

It is a good idea to make a copy constructor's parameters __________ by specifying the __________ key word in the parameter list.

A) inline, inline
B) static, static
C) constant, const
D) global, global
E) None of these

Question 27

To overload the + operator, you would write a function named

A) overload +
B) operator +
C) function +
D) operator.overload(+)
E) None of these

Question 28

An ___________ operator can work with programmer-defined data types.

A) inline
B) unconditional
C) overloaded
D) undefined
E) None of these

Question 29

When you overload an operator, you cannot change the number of __________ taken by the operator.

A) arguments
B) parameters
C) operations
D) operands
E) None of these

Question 30

A(n) __________ is a special function that is called whenever a new object is created and initialized with another object's data.

A) static function
B) destructor
C) copy constructor
D) assignment function
E) None of these

Question 31

A member function that is declared __________ may not access any non-static data members in the class.

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

Question 32

When a class contains an instance of another class, it is known as

A) object overloading
B) operator overloading
C) object composition
D) dynamic composition
E) None of these

Question 33

Which of the following operators may be used to assign one object to another?

A) =
B) ==
C) <>
D) @
E) None of these

Question 34

If you do not furnish a(n) __________, an automatic memberwise copy will be performed when one object is assigned to another object.

A) overloaded constructor function
B) overloaded assignment operator
C) default constructor function
D) overloaded copy operator
E) None of these

Question 35

The __________ member variable may be accessed before any objects of the class have been created.

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

Question 36

A reason to overload the __________ is to allow you to write classes that have array-like behaviors.

A) parentheses ( ) operator
B) curly braces { } operator
C) square brackets [ ] operator
D) colon :: operator
E) None of these

Question 37

If a member is declared __________, all objects of that class have access to that variable.

A) static
B) dynamic
C) inline
D) default
E) None of these

Question 38

Which type of function is not a member of a class but has access to the private members of the class?

A) static
B) constructor
C) destructor
D) friend
E) None of these

Question 39

A(n) __________ is a special built-in pointer that is available to a class's member functions..

A) this pointer
B) &constructor pointer
C) ~destructor *ptr
D) overload operator, ->
E) None of these

Question 40

If you do not furnish a __________, a default one will be provided by the compiler.

A) constructor
B) destructor
C) copy constructor
D) All of these
E) None of these

Question 41

In C++11 reference variables that can refer only to temporary objects that would otherwise have no name are called __________ and are declared with a __________.

A) rvalues, ampersand (&)
B) lvalues, ampersand (&)
C) lvalues, double ampersand (&&)
D) rvalues, double ampersand (&&)
E) None of these

Question 42

In the following function header, the word int is known as a(n) __________. FeetInches FeetInches:
:
Operator++(int)

A) parameterless data type
B) incomplete argument
C) dummy parameter
D) incomplete parameter
E) None of these

Question 43

A(n) __________ informs the compiler that a class will be declared later in the program.

A) static function
B) private data member
C) forward declaration
D) object conversion
E) None of these

Question 44

Select all that apply. Given the following code fragment, which of the things shown below happen when the statement on line 8 executes?
1 int square(int a)
2 {
3 return a * a;
4 }
5 int main()
6 {
7 int x = 0;
8 x = square(5);
9 cout << x << endl;
10 return 0;
11 }

A) The square function is called and the value 5 is passed as an argument.
B) The square function calculates 5*5 and stores the result, 25, as a temporary value.
C) The temporary value is copied (assigned) to the variable x.
D) The temporary value is discarded by the system.
E) None of these

Question 45

In C++11 the __________ operator swaps the members of the object being assigned with the temporary object.

A) move assignment
B) swap assignment
C) temp assignment
D) semantic assignment
E) None of these

Question 46

In C++11 values that persist beyond the statement that created them and have names that make them accessible to other statements in the program are called

A) rvalues
B) lvalues
C) temporary values
D) semantics
E) None of these