Deck 10: Developing Object-Oriented Php

Question 1

Class names in PHP usually begin with a lowercase letter.

Answer 1

False

Question 2

The term object specifically refers to programming code and data that can be treated as an individual unit or component.

Answer 2

True

Question 3

The term object-oriented programming (OOP) refers to the concept of merging related variables and functions into a single interface.

Answer 3

True

Question 4

Objects are encapsulated, which means that all code and required data are contained within the object itself.

Question 5

The term data structure refers to a system for organizing classes.

Question 6

Data are often also called components.

Question 7

An interface refers to objects that are required for a source program to communicate with data.

Question 8

When you delete an object from an existing class, you are said to be instantiating the object.

Question 9

The term, garbage collection, refers to cleaning up, or reclaiming, memory that is reserved by a program.

Question 10

A class constructor is a special attribute with the same name as its class that is called automatically when an object from the class is instantiated.

Question 11

Class functions are referred to as data members or member data.

Question 12

Class variables are referred to as data members or member variables.

Question 13

In object-oriented programming, the code, methods, attributes, and other information that make up an object are organized into classes.

Question 14

To create a class in PHP, you use the class keyword to write a class definition, which contains that data members and member functions that make up the class.

Question 15

After you instantiate an object, you use a hyphen and a greater-than symbol (->), referred to as member selection notation, to access the methods and properties contained in the object.

Question 16

The term data refers to information contained within objects or other types of storage structures

Question 17

The functions and variables defined in a class are called functional members

Question 18

Variables that are associated with an object are called properties or attributes.

Question 19

The functions associated with an object are called methods.

Question 20

An instance is an object that has been created from an existing class.

Question 21

Although the destructor function is always called, a constructor function is only called when you instantiate a new class object.

Question 22

Methods and properties that are required for a source program to communicate with an object are referred to as a(n) ____.

A) interface
B) attribute
C) function
D) class

Question 23

A constructor function is a special function that is called automatically when an object from a class is instantiated.

Question 24

When you serialize an object with the serialize() function, PHP looks in the object's class for a special function named __sleep() function, which you can use to perform many of same tasks as a destructor function.

Question 25

Objects are often called ____.

A) components
B) properties
C) reusable code
D) functions

Question 26

Access specifiers control a client's access to individual data members and member functions.

Question 27

Objects are organized into ____.

A) programs
B) instances
C) functions
D) classes

Question 28

The principle of information hiding states that any class members that other programmers, sometimes called clients, do not need to access or know about should be hidden.

Question 29

Programming code and data that can be treated as an individual unit or component is known as a(n) ____.

A) method
B) function
C) attribute
D) object

Question 30

Serialization refers to the process of converting an object into binary data that you can store for reuse.

Question 31

Accessor functions are private member functions that a client can call to retrieve or modify the value of a data member.

Question 32

An object created from an existing class is called a(n) ___

A) method
B) property
C) instance
D) variable

Question 33

____ are variables associated with an object.

A) Properties
B) Components
C) Elements
D) Parameters

Question 34

Reusable software objects that can be incorporated into multiple programs is called ____.

A) object-based programming
B) object-oriented programming
C) snipets
D) functions

Question 35

____ are functions associated with an object.

A) Properties
B) Data
C) Methods
D) Return functions

Question 36

Information contained within variables is called ____.

A) code
B) data
C) components
D) objects

Question 37

There are three levels of access specifiers in PHP: public, private, and protected.

Question 38

A destructor function cleans up any resources allocated to an object after the object is destroyed.

Question 39

The public access specifier allows anyone to call a class's member function or to modify or retrieve the value of a data member.

Question 40

Objects in which all code and required data are contained within the object itself are ____.

A) instances
B) contained
C) null
D) encapsulated

Question 41

A hyphen and a greater-than symbol used to access the methods and properties contained in an object are referred to as ____.

A) class
B) member selection notation
C) selector
D) data structure

Question 42

Class variables are known as ____.

A) class members
B) data members
C) classmates
D) parameters

Question 43

Another name for a property is a(n) ____________________.

Question 44

____________________ can be referred to as components.

Question 45

____________________ places code inside what programmers like to call a "black box."

Question 46

When an object from the class is instantiated it automatically calls a(n) ____, which is a special function with the same name as its class.

A) class constructor
B) method
C) attribute
D) member function

Question 47

____ is a system for organizing data.

A) Programming
B) Database Storage
C) Data structure
D) Class creation

Question 48

A particular instance of an object ____ the methods and properties its class.

A) cancels
B) inherits
C) creates
D) instantiates

Question 49

To enable anyone to call a class's member function use a(n) ____.

A) private access specifier
B) public access specifier
C) hidden access specifier
D) open access specifier

Question 50

Data refers to information contained within ____________________.

Question 51

To create a class in PHP, use the ____ keyword to write a class definition.

A) definition
B) class
C) create
D) construct

Question 52

Use the ____ comparison operator to determine whether an object is instantiated from a given class.

A) instanceof
B) classof
C) objectof
D) memberof

Question 53

The ____ portion of the class definition is the name of the new class.

A) Definition
B) Object
C) MemberClass
D) ClassName

Question 54

Class functions are called ____.

A) methods
B) constructors
C) function members
D) class members

Question 55

____________________ associated with an object are called methods.

Question 56

____ are the functions and variables defined in a class.

A) Constructors
B) Methods
C) Function Members
D) Class Members

Question 57

The ____ function determines whether a class exists and is available to the current script.

A) object_exists()
B) get_class()
C) class_exists()
D) member_exists()

Question 58

____ the object means creating an object from a class.

A) Editing
B) Threading
C) Instantiating
D) Copying

Question 59

Cleaning up, or reclaiming memory that is reserved by a program is called ___

A) housekeeping
B) garbage collection
C) refreshing
D) flushing

Question 60

Class members that other programmers do not need access to should be ____.

A) hidden
B) deleted
C) saved
D) copied

Question 61

The ____________________ function allows you to format variables in an output string.

Question 62

To determine if the database connection failed when working with a mysqli object, you need to use the ____________________ data member of the mysqli object to retrieve the error code from the last connection attempt.

Question 63

A programming object and its interface can be compared to a handheld ____________________.

Question 64

Data structures are a system for organizing ____________________.

Question 65

A(n) ____________________ is a template that serves as the basis for new objects.

Question 66

After you instantiate a class object, ____________________ are referred to as properties of the object.

Question 67

Garbage collection is a term that refers to cleaning up or ____________________ memory that is reserved by a program.

Question 68

____________________ stores both data members and member functions into strings.

Question 69

When you use an object in your program, you create a(n) ____________________ of the class of the object.

Question 70

____________________ are primarily used to initialize properties when an object is first instantiated.

Question 71

The protected access specifier is used with a more advanced object-oriented programming technique called ____________________.

Question 72

You declare an object in PHP by using the ____________________ operator with a class constructor.

Question 73

The syntax for using the instanceof operator is object_name instanceof ____________________.

Question 74

____________________ access does not restrict a class's internal access to its own members.

Question 75

____________________ gives an encapsulated object its black box capabilities so that users of a class can see only the class members that you allow them to see.

Question 76

In order for a source program to communicate with an object, it must use a(n) ____________________ of methods and properties.

Question 77

To use the variables and functions in a class, you instantiate an object by declaring the object as a new ____________________ of the class.

Question 78

Instances of objects ____________________ their characteristics, such as class members, from the class upon which they are based.

Question 79

The best way to initialize a data member is with a(n) ____________________.