Deck 11: More About Classes and Object-Oriented Programming

Question 1

C++ permits you to overload the sizeof operator.

Answer 1

False

Question 2

A reason to overload the ________ is to write classes that have array-like behavior.

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

Answer 2

C

Question 3

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.

Answer 3

False

Question 4

C++ requires that a copy constructor's parameter be

A) an integer data type.
B) a floating-point data type.
C) a pointer variable.
D) a reference to an object.
E) None of the above

Question 5

When a class contains a pointer to dynamically allocated memory, it a good idea to have the class overload the assignment operator.

Question 6

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

A) static member variables.
B) instance member variables.
C) static member functions.
D) All of the above
E) None of the above

Question 7

A good reason for overloading an operator is to enable it to

A) outperform its C language counterparts.
B) be used with types defined by the programmer.
C) operate on more operands than in its standard definition.
D) operate on no operands.
E) None of the above

Question 8

The ________ operator may be used to assign one object to another.

A) =
B) ==
C) <>
D) &
E) None of the above

Question 9

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

Question 10

If a function f is a friend of a class A, and the class A is a friend of a class B, then the function f is able to access private members of B.

Question 11

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

Question 12

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

Question 13

When a class contains a pointer to dynamically allocated memory, it is a good idea to equip the class with

A) a dynamically allocated constructor.
B) a copy constructor.
C) a static constructor and an overloaded comparison operator.
D) an inline constructor.
E) None of the above

Question 14

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 the above

Question 15

It is a good idea to make a copy constructor's parameters ________ by specifying the ________ keyword in the parameter list.

A) inline, inline
B) static, static
C) constant, const
D) global, glob
E) None of the above

Question 16

The process of having a class contain an instance of another class is known as

A) object overloading.
B) operator overloading.
C) object composition.
D) dynamic composition.
E) None of the above

Question 17

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

Question 18

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

Question 19

C++ allows you to overload

A) compiler errors.
B) preprocessor directives.
C) operators and functions.
D) undefined variables.
E) None of the above

Question 20

A(n) ________ member variable may be accessed before any objects of the class have been declared.

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

Question 21

A member function that is declared ________ cannot use the this pointer.

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

Question 22

If a member variable is declared ________, all objects of that class share access to that variable.

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

Question 23

A lambda expression is

A) an expression whose value can only be assigned to a local variable.
B) used by the C++ compiler to check the types of other expressions.
C) a class derived from a function object.
D) an object of a class whose only member is the function call operator.
E) None of the above

Question 24

The library function move() can be used to

A) transfer ownership of a managed object from one unique_ptr object to another.
B) move the contents of a dynamically allocated block of memory to another address.
C) move the contents of any block of memory to another address.
D) make a raw pointer point to a different memory location.

Question 25

If an rvalue reference refers to a memory location, that memory location becomes an lvalue.

Question 26

________ members of a base class are never accessible to a derived class.

A) Public
B) Private
C) Protected
D) A, B, and C
E) None of the above

Question 27

A member function of a derived class may not have the same name as a member function of a base class.

Question 28

When you derive a class from an existing class, you

A) can add new data, but cannot add new functions.
B) can add new functions, but cannot add new data.
C) can add both new data and new functions.
D) must add both new data and new functions.
E) None of the above

Question 29

________ allows us to create new classes based on existing classes.

A) Polymorphism
B) Inheritance
C) Function overloading
D) The copy constructor
E) None of the above

Question 30

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

Question 31

A derived class may become a base class, if another class is derived from it.

Question 32

Some C++ operators cannot be overloaded by the programmer.

Question 33

A ________ function is not a member of a class, but it has access to the private members of the class.

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

Question 34

The ________ class constructor is called before the ________ class constructor.

A) base, derived
B) derived, base
C) public, private
D) private, public
E) None of the above

Question 35

A derived class may not have any classes derived from it.

Question 36

In the statement class Car:public Vehicle, which is the base class?

A) Car
B) Vehicle
C) public
D) class
E) None of the above

Question 37

In an inheritance situation, you can't pass arguments to a base class constructor.

Question 38

A situation in which every object of a class A has a pointer to an object of a class B, and the objects of the class B may outlive objects of class A, is called

A) a has-A relation.
B) aggregation.
C) composition.
D) an is=A relation.
E) None of the above

Question 39

Arguments are passed to the base class destructor function by the ________ class ________ function.

A) derived, constructor
B) derived, destructor
C) base, constructor
D) base, destructor
E) None of the above

Question 40

A static member function can be called independently of any object of the class.

Question 41

In an inheritance situation, the new class that you create from an existing class is known as the

A) derived class.
B) inheritee.
C) child class.
D) both A and C
E) None of the above

Question 42

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

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

Question 43

A(n) ________ is a special function that is called whenever a new object is created and initialized with data from another object of the same class.

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

Question 44

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

Question 45

The this pointer is automatically passed to static member functions of a class.

Question 46

If you do not furnish a(n) ________ for a class, a default will be provided for you by the compiler.

A) copy constructor
B) constructor
C) assignment operator
D) All of the above
E) None of the above

Question 47

A constructor that takes a single parameter of a type other than its class is called a convert constructor.

Question 48

When overloading the operator ++, ________ is used to distinguish preincrement from postincrement.

A) a parameterless data type
B) the keyword void
C) a dummy integer parameter
D) the placeholder [ ]
E) None of the above

Question 49

Object composition is useful for creating a ________ relationship between classes.

A) friend
B) static
C) has-a
D) conditional
E) None of the above

Question 50

The base class's ________ affects the way its members are inherited by the derived class.

A) name
B) return data type
C) access specification
D) both A and B
E) None of the above

Question 51

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

Question 52

A static member function cannot be called if no objects of the class exist.

Question 53

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) overwhelmed
E) None of the above

Question 54

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

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

Question 55

Protected members of a base class are like ________, with the exception that they may be accessed by derived classes.

A) constructor functions
B) static members
C) private members
D) public members
E) None of the above

Question 56

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

Question 57

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

Question 58

The structure member selector operator . cannot be overloaded.

Question 59

To dereference an object pointer and access one of the object's members, use the

A) -> operator.
B) <> operator.
C) dot operator.
D) & operator.
E) None of the above

Question 60

The ________ is a special built-in pointer that is available to a class's instance member functions.

A) overloaded -> operator
B) this pointer
C) &constructor pointer
D) ~destructor *ptr
E) None of the above

Question 61

The base class access specification can be viewed as a filter that base class members must pass through when becoming inherited members of a derived class.

Question 62

In the statement class Car:protected Vehicle, which is the derived class?

A) Car
B) Vehicle
C) protected
D) The answer cannot be determined from the information given.
E) None of the above

Question 63

In the statement class Car:protected Vehicle, what is being protected?

A) Derived class functions
B) Base class members
C) Derived class data
D) Future inherited classes
E) None of the above

Question 64

An lvalue is

A) a value of type long.
B) a memory location that is associated with a name that can be used by different parts of the program to access the memory location.
C) An expression denoting a value that appears as the left operand of a binary operator.
D) a value of type long returned from a function.
E) None of the above

Question 65

________ is commonly used to extend a class, or to give it additional capabilities.

A) Inheritance
B) Privacy
C) The constructor
D) The destructor
E) None of the above

Question 66

A base class cannot contain a pointer to one of its derived classes.

Question 67

A function object is

A) an instance of a class that has exactly one member function and no member variables.
B) an object of a class that has any number of member functions, but no member variables.
C) an object of a class that overloads the function call operator ().
D) an object that has a member variable that is a pointer to a function.
E) None of the above

Question 68

When arguments must be passed to the base class constructor, they are passed from the derived class constructor's header line.

Question 69

The ________ class destructor is called before the ________ class destructor.

A) base, derived
B) derived, base
C) public, private
D) private, public
E) None of the above

Question 70

An rvalue is

A) a temporary value that cannot be accessed from a different part of the program.
B) the right operand of a binary operator.
C) a value passed as the rightmost parameter of a function.
D) a memory location that is associated with a name that can be used by different parts of the program to access the memory location.
E) None of the above