Deck 8: More Object Concepts

Question 1

In some programming languages, such as C#, Visual Basic, and Java, every class you create is a child of one ultimate base class, often called the ____ class.

A)Initial
C)Core
B)Object
D)Basic

Answer 1

B

Question 2

A child class contains all the data fields and ____ of its parent.

A)parameters
C)methods
B)classes
D)procedures

Answer 2

C

Question 3

A constructor may require ____.

A)parameters
C)objects
B)methods
D)inheritance

Answer 3

A

Question 4

A destructor contains the actions you require when an instance of a class is destroyed.

Question 5

A destructor cannot execute unless it is explicitly called from a program.

Question 6

When you instantiate an object that is a member of a class, you are actually calling a constructor method.

Question 7

Using inheritance saves time since you do not need to recreate a class's methods and data fields.

Question 8

A(n) ____ cannot be overloaded.

A)instance method
C)constructor
B)method
D)destructor

Question 9

____ is the process of creating a new, derived class from a base class.

A)Accessibility
C)Inheritance
B)Encapsulation
D)Polymorphism

Question 10

One way to give a child class access to a private data field in a parent class is to make the data field public in the parent class.

Question 11

When declaring a destructor, which character is used?

A)pound sign
C)tilde
B)asterisk
D)exclamation point

Question 12

A(n) ____ is a method that establishes an object, reserving enough memory space for it and providing its name.

A)destructor
C)inheritor
B)constructor
D)originator

Question 13

Derived classes usually have fields and methods that are more ____ than those of their parent classes.

A)stable
C)basic
B)generalized
D)specialized

Question 14

A superclass member that is not hidden is invisible in the derived class.

Question 15

A class's ____constructor is automatically supplied.

A)initial
C)default
B)object
D)destructor

Question 16

If a class's only constructor requires an argument, you must provide an argument for every object of the class you create.

Question 17

An instance method or constructor may be overloaded by providing the same name and ____ argument list.

A)a different
C)a larger
B)the same
D)a smaller

Question 18

Methods that are inherited from a parent class can be overridden.

Question 19

A superclass is the same thing as a derived class.

Question 20

All default constructors are automatically supplied.

Question 21

Code that has been used and tested is said to be ____.

A)responsible
C)inherited
B)reliable
D)encapsulated

Question 22

A(n) ____ constructor is one that requires no arguments.

A)automatic
C)original
B)implicit
D)default

Question 23

The ____________________ of a subclass consist of the entire list of parent classes from which a child class is derived.

Question 24

When a superclass requires parameters upon instantiation, even if you have no other reason to create a(n) ____, you must write one so it can call its superclass's constructor.

A)overridden method
C)subclass constructor
B)public subclass
D)subclass destructor

Question 25

When a data field is private, it is said to be ____ to any class other than the one in which it is defined.

A)uninheritable
C)unreachable
B)implicit
D)inaccessible

Question 26

A subclass constructor can pass ____ or parameters to its parent constructor.

A)constants
C)objects
B)methods
D)classes

Question 27

Every derived class "____" specific instance of the base class and the derived class.

A)instantiates a
C)was a
B)has a
D)is a

Question 28

An ____ child class method has the same name and different parameter list as the parent class method.

A)overridden
C)overbearing
B)overloaded
D)inherited

Question 29

When a superclass contains only constructors that require arguments, you must include at least ____ constructor(s) for each subclass you create.

A)zero
C)two
B)one
D)three

Question 30

You can write as many constructors for a class as you want, as long as they all have different ____ lists.

A)object
C)method
B)data field
D)parameter

Question 31

What is accomplished when you assign a derived class object to an object of any of its superclass types?

A)implicit conversion
C)instantiation
B)explicit conversion
D)inheritance

Question 32

When you create any subclass object, the ____ constructor must execute first, and then the ____ constructor executes.

A)subclass, superclass
C)default, specialized
B)superclass, subclass
D)default, superclass

Question 33

A ____________________ is declared with the class name preceded by a tilde (~), and you supply no arguments.

Question 34

In a class diagram, what symbol is used for the protected access modifier?

A)pound sign
C)dollar sign
B)asterisk
D)exclamation point

Question 35

An ____ child class method contains the same name and parameters as the parent class method.

A)overridden
C)overbearing
B)overloaded
D)inherited

Question 36

What is the name of the access modifier that gives child classes access to the parent class's data fields?

A)private
C)public
B)protected
D)semi-private

Question 37

A(n) ____________________ is used as the basis for inheritance.

Question 38

A(n) ____________________ constructor is a constructor with no parameters.

Question 39

The type of polymorphism that applies specifically to objects of the same parent class is sometimes called ____ polymorphism.

A)subtype
C)dual
B)subclass
D)inherited

Question 40

The ____________________ establishes an object by reserving enough memory space for it and possibly initializing member variables.

Question 41

A(n) ____________________ conversion is made whenever you assign a derived class object to an object of any types that are ancestors.

Question 42

A(n) ___________________ is another name for a child class and derived class.

Question 43

If the class Poodle inherits from the class Dog, then Dog is a(n) ____________________ of Poodle.

Question 44

When you override a method in a child class, you create a method with the same name and ____________________ as the parent's version.

Question 45

A(n) ____________________ class is one from which you can inherit, but not create, any object.

Question 46

Classes that depend on field names from parent classes are said to be ____________________ because they are prone to errors.

Question 47

The capability to inherit from more than one class is called ____________________.

Question 48

Professional programmers constantly create new class ____________________ for use with OOP languages.

Question 49

Reliable code has been thoroughly ____________________ and can probably be used in a variety of situations.

Question 50

A method in a parent class must be ____________________ in order to be used by the child class.