PHP OOP

Question 1

Object Oriented Programming is a programming model that is based on the concept of ________ and ________

Answer 1

Classes and Objects

Question 2

This is an advantage of OOP that helps in making code much easier to maintain, modify and debug

Answer 2

DRY - Don’t Repeat Yourself

Question 3

Two main aspects of OOP

Answer 3

Classes and Objects

Question 4

A self-contained, independent collection of variables and functions which work together to perform one or more specific tasks

Answer 4

Class

Question 5

This is individual instance of a class

Answer 5

Object

Question 6

A class acts as ____ or ____ from which individual objects can be created.

Answer 6

Template; Blueprint

Question 7

How a class can be declared?

Answer 7

• class keyword
• pair of curly braces

Question 8

Variables within a class

Answer 8

properties

Question 9

Functions within a class

Answer 9

Methods

Question 10

How should class names be written in _____ with each word should be ______ and starts with the uppercase letter

Answer 10

PascalCase; concatenated

Question 11

It is used to access contained properties and methods of a given object

Answer 11

Arrow Symbol (->)

Question 12

This is a reference to the calling object

Answer 12

$this

Question 13

It allows us to initialize the object’s properties upon creation of an object

Answer 13

Constructor

Question 14

This function declares the constructor in the class

Answer 14

__construct();

Question 15

This must be included when declaring a construct

Answer 15

Double underscore

Question 16

It is called when the object is destructed or the script is stopped or exited

Answer 16

Destructor

Question 17

This is called at the end of the script of the class

Answer 17

__destruct();

Question 18

Constructors are invoked automatically every time you _______ while destructors are in automatically invoked when you create a ______

Answer 18

create an object; __destruct() function

Question 19

One can restrict access to properties and methods by the use of __________, also called as, ___________, for greater control

Answer 19

Visibility Keywords; Access Modifiers

Question 20

This is a property or method that can be accessed anywhere within or outside of class

Answer 20

public

Question 21

This property or method can only be accessed within the class or an inherited class

Answer 21

protected

Question 22

This is a property or method that is accessible only within the class that defines it.

Answer 22

private

Question 23

Classes can inherit the properties and methods of another class using ____ keyword

Answer 23

extends

Question 24

What is the difference of constant and static variables

Answer 24

• Constants cannot be changed at runtime
• Static Variables can be changed

Question 25

How to access a static variable if inside or outside the class?

Answer 25

Class name followed by :: and the name of the static variable with $

Question 26

How to access a static variable if only accessing in the inside of the class?

Answer 26

self keyword followed by :: and the name of the static variable with $

Question 27

:: is also called as

Answer 27

Resolution operator

Question 28

This is the world's largest Internetwork

Answer 28

Internet

Question 29

This is a unique identification where each computer in the Internet has assigned one

Answer 29

IP address

Question 30

Meaning of IP

Answer 30

Internet Protocol

Question 31

This is an organization that gives IP address to various Internet Service Providers

Answer 31

InterNIC

Question 32

Possible IP addresses in the Internet

Answer 32

4,294,967,296

Question 33

This is the English version of IP address

Answer 33

Domain name

Question 34

The Internet uses _____________, which means not all computers connected to the Internet are the ssame

Answer 34

Client-server relationship

Question 35

Special types of computers that are capable of delivering information and data

Answer 35

Server

Question 36

These are computer that may only receive data

Answer 36

Clients

Question 37

This is the fastest growing part of the Internet

Answer 37

World Wide Web

Question 38

WWW is a/an ____________ on the Internet that allows documents to be connected to other documents by hypertext links

Answer 38

Information system

Question 39

The coding language for WWW as the foundation for all Web pages

Answer 39

Hypertext Markup Language

Question 40

The individual responsible for maintaining and updating content of a WWW document

Answer 40

Webmaster

Question 41

Name given to any computer registered on the WWW as official provider of info and files

Answer 41

Domain name

Question 42

Identification for all WWW documents

Answer 42

Uniform Resource Locator

Question 43

URL Types

Answer 43

1. Web - https://www.server.name 2. Gopher - gopher://gopher.server.name 3.FTP - ftp://ftp.server.name 4. Telnet - telnet://server.name 5. E-mail - mailto:address@server.name

Question 44

The multi-user version of a program called Talk

Answer 44

Internet Relay Chat (IRC)

Question 45

Who developed IRC and who developed?

Answer 45

Jarkko Oikarinen by 1980s

Question 46

Who created WWW

Answer 46

Tim Berners-Lee, 1989

Question 47

One of the most popular methods of obtaining software and documents on the Internet as it basically sets rules for transferring files in a fast, efficient, and reliable way.

Answer 47

File Transfer Protocol

Question 48

One of the first Internet services developed to enable users to transfer files from one place to another.

Answer 48

File Transfer Protocol

Question 49

Four parts of Web URL

Answer 49

1. Protocol 2. Server 3. Path 4. Filename

Question 50

Defined as ways in which computers communicate with each other

Answer 50

Internet Protocols

Question 51

They determine how data is sent, how data is received, what must be done to ensure that the data received is correct, what kind of data is sent, and so on.

Answer 51

Internet Protocols

Question 52

They developed a reference model that identifies carious levels in the network communication

Answer 52

The International Standards Organization (OSI)

Question 53

Was adopted as the standard by the developers of the Internet.

Answer 53

Transmission Control Protocol - Internet Protocol (TCP/IP)

Question 54

TCP/IP is required for ______

Answer 54

Internet connection

Question 55

This is the WWW application-layer protocol

Answer 55

Hypertext Transfer Protocol

Question 56

It defines how Web clients (Internet browsers) request pages from Web servers and how Web servers transfer Web pages to Web clients.

Answer 56

Hypertext Transfer Protocol

Question 57

A web page, also known as ____, consists of objects which may be an HTML file, images, applets and so on

Answer 57

Document

Question 58

This is usually composed of an HTML file and several referenced objects.

Answer 58

Web Page

Question 59

This refers to the address of a resource on the Web.

Answer 59

Uniform Resource Locator

Question 60

This is anything available on the Web like an HTML page, a graphic file or a CGI script

Answer 60

Resource

Question 61

It names a specific resource on the Web.

Answer 61

Uniform Resource Name

Question 62

URL and URN are components of the more general class called

Answer 62

Uniform Resource Identifiers

Question 63

After protocol, a colon separates it from the protocol

Answer 63

Resource Description

Question 64

It is the host element identifies the site address of the computer which is the source of the file being displayed.

Answer 64

Site address

Question 65

Two parts of site address

Answer 65

Machine Name and Domain Name

Question 66

It follows the site address but is separated using a colon.

Answer 66

Port Number

Question 67

Default port number

Answer 67

Port 80

Question 68

Port that is requested by HTTPS

Answer 68

Port 443

Question 69

This is actually pointed whenever you access a resource on the Web or the Internet

Answer 69

Filepath and Filename

Question 70

This feature of URL’s allows you to actually point to a specific location (a section, paragraph, or sentence) within a file to view.

Answer 70

Fragment Identifier

Question 71

These are arguments or data variables passed on to the next resource being retrieved.

Answer 71

Parameters