Deck 11: More Object Oriented Programming Concepts

Question 1

The built-in Exception s in a programming language can cover every condition that might be an Exception in your applications.

Answer 1

False

Question 2

You can create constructors for a class with or without parameters.

Answer 2

True

Question 3

The most common way to declare a destructor explicitly is to use an identifier that consists of ____.

A) a colon followed by the class name
B) a period followed by the class name
C) a tilde followed by the class name
D) an exclamation mark followed by the class name

Answer 3

C

Question 4

If a constructor requires arguments, it is a ____ constructor.

A) reliable
B) private
C) default
D) nondefault

Question 5

A(n) ____ in a class diagram indicates public access.

A) minus sign
B) diamond
C) plus sign
D) exclamation point

Question 6

By using standard component classes, programmers are assured that the GUI components in their programs have the same look and feel as those in other programs.

Question 7

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

A) children
B) ancestors
C) subordinates
D) derivatives

Question 8

When using existing objects, you need to concentrate only on the interface to those objects, not on the internal instructions that make them work.

Question 9

A derived class always ____ case or instance of the more general base class.

A) has a
B) makes a
C) redefines a
D) is a

Question 10

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) Top
B) Object
C) Ultimate
D) Mega

Question 11

It makes sense that a parent class object has access to its child's data and methods.

Question 12

An abstract class is one from which you can create any concrete objects and from which you can inherit.

Question 13

You cannot provide parameters to a destructor; it must have an empty parameter list.

Question 14

Any constructor you write must have the same name as the class it constructs, and it cannot have a return type.

Question 15

The relationship created with composition is called a(n) ____ relationship.

A) is-a
B) has-a
C) with-a
D) child

Question 16

When properly used, inheritance always involves a ____ relationship.

A) specific-to-general
B) general-to-specific
C) specific-to-specific
D) general-to-general

Question 17

A class that is used as a basis for inheritance is called a ____ class or a superclass.

A) base
B) bottom
C) platform
D) derived

Question 18

In object-oriented terminology, "default constructor" means a constructor with a single standard parameter.

Question 19

In OOP languages, a default constructor is created automatically by the compiler for every class you write.

Question 20

A method's name and a list of argument types together are its ____.

A) signature
B) header
C) profile
D) interface

Question 21

____ are stored collections of classes that serve related purposes

A) Libraries
B) Constructors
C) IDE
D) Destructors

Question 22

Code that has already been tested and used in a variety of situations is said to be ____.

A) protected
B) private
C) overloaded
D) reliable

Question 23

When using ____________________, you can develop new classes more quickly by extending classes that already exist and work.

Question 24

If an exception is thrown, it is passed to a block of code that can ____, which means to receive it in a block that can handle the problem.

A) catch the exception
B) raise the exception
C) hold the exception
D) try the exception

Question 25

In traditional programming, probably the most often used error-handling outcome was to ____.

A) terminate the program in which the offending statement occurred
B) ignore the error
C) handle the error
D) ask the user for additional input

Question 26

In object-oriented terminology, the generic name used for errors is ____.

A) bugs
B) undefined branches
C) interfaces
D) exceptions

Question 27

An instance of a class becomes eligible for destruction when it is no longer possible for any code to use it-that is, when it goes out of ____________________.

Question 28

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

A) robust
B) innovative
C) fragile
D) constructive

Question 29

Programmers sometimes refer to a situation in which nothing goes wrong as the ____ case.

A) rainbow day
B) sunny day
C) cloudy day
D) pessimistic

Question 30

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

A) poly
B) multiple
C) branch
D) dual

Question 31

When you create a segment of code in which something might go wrong, you place the code in a ____ block.

A) throw
B) hold
C) try
D) catch

Question 32

____________________ is the mechanism by which a child class method is used by default when a parent class contains a method with the same signature.

Question 33

By using ____, you can use reasonable, easy-to-remember names for methods and concentrate on their purpose rather than on memorizing different method names.

A) inheritance
B) inference
C) polymorphism
D) relationships

Question 34

Libraries, collections of classes that serve related purposes, are also called ____________________.

Question 35

You almost always code at least one catch block immediately following a(n) ____________________ block.

Question 36

In several languages, the visual development environment is known by the acronym ____.

A) IDE
B) XML
C) ODI
D) IPE

Question 37

Object-oriented programs employ a more specific group of techniques for handling errors called ____.

A) exception raising
B) exception management
C) exception handling
D) garbage collection

Question 38

When a data field within a class is ____, no outside class can use it-including a child class.

A) reliable
B) fragile
C) private
D) protected

Question 39

Programmers use the phrase ____ to describe what happens when worthless or invalid input causes inaccurate or unrealistic results.

A) WIGO
B) GOGI
C) LIFO
D) GIGO

Question 40

When you purchase or download a(n) ____ for an object-oriented programming language, it comes packaged with many predefined, built-in classes.

A) compiler
B) IDE
C) sunny day case
D) interpreter

Question 42

Discuss the general principle of exception handling in object-oriented programming.

Question 43

List three advantages of creating a useful, extendable superclass.

Question 44

Discuss exception handling.

Question 45

Describe the Object class.

Question 46

Describe the components of a try block.

Question 47

List the elements you would use to create a catch block.

Question 48

Explain constructors.

Question 49

Explain how to create your own throwable Exception .

Question 50

Explain inheritance.

Question 51

Explain composition.