Quiz 10: Developing Object-Oriented Php

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

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

Data are often also called components.

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

The functions associated with an object are called methods.

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

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

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

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

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

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

Class names in PHP usually begin with a lowercase letter.

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.

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.

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

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

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

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

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.

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

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.

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

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

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

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

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

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

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

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.

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

Reusable software objects that can be incorporated into multiple programs is called ____. A) object-based programming B) object-oriented programming C) snipets D) functions

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

Objects are often called ____. A) components B) properties C) reusable code D) functions

Information contained within variables is called ____. A) code B) data C) components D) objects

____ are functions associated with an object. A) Properties B) Data C) Methods D) Return functions

____ are variables associated with an object. A) Properties B) Components C) Elements D) Parameters

Objects in which all code and required data are contained within the object itself are ____. A) instances B) contained C) null D) encapsulated

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

Objects are organized into ____. A) programs B) instances C) functions D) classes

An object created from an existing class is called a(n) ___ A) method B) property C) instance D) variable

____ the object means creating an object from a class. A) Editing B) Threading C) Instantiating D) Copying

A particular instance of an object ____ the methods and properties its class. A) cancels B) inherits C) creates D) instantiates

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

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

____ is a system for organizing data. A) Programming B) Database Storage C) Data structure D) Class creation

____ are the functions and variables defined in a class. A) Constructors B) Methods C) Function Members D) Class Members

Class variables are known as ____. A) class members B) data members C) classmates D) parameters

Class functions are called ____. A) methods B) constructors C) function members D) class members

To create a class in PHP, use the ____ keyword to write a class definition. A) definition B) class C) create D) construct

The ____ portion of the class definition is the name of the new class. A) Definition B) Object C) MemberClass D) ClassName

Use the ____ comparison operator to determine whether an object is instantiated from a given class. A) instanceof B) classof C) objectof D) memberof

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()

Cleaning up, or reclaiming memory that is reserved by a program is called ___ A) housekeeping B) garbage collection C) refreshing D) flushing

Class members that other programmers do not need access to should be ____. A) hidden B) deleted C) saved D) copied

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

____________________ can be referred to as components.

Data refers to information contained within ____________________.

____________________ associated with an object are called methods.

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

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

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

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

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

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

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

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

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

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.

Data structures are a system for organizing ____________________.

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

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

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

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

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

____________________ 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.

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

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

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

____________________ stores both data members and member functions into strings.