Exam - Dynamic web

Question 1

Connecting to website

Answer 1

• Client (PC) connects to server host
• client submits website request (the URL)
• Server returns website request + information
• client reads webcode –> displays to user

Question 2

static vs dynamic webpage

Answer 2

static - does not change frequently, client only sends 1 request

dynamic - webpage contains variable info that changes over time. overall layout is the same, data displayed will vary between visits

Question 3

server-side dynamic page

Answer 3

server generates webpage –> webpage sent to client

used for server-side info (eg stock prices, content hosting sites)

Question 4

client-side dynamic page

Answer 4

server sends webpage code –> client generates the webpage

used for webpages that need to update per user activity

Question 5

Server-side vs client-side operations - examples

Answer 5

server
- web-specific data updates
- Business logic code

client
- UI manipulation
- user responses

Question 6

cookies - how they work

Answer 6

• stored by browser as encrypted client-specific info
• connect to site –> server provides cookie info –> client stores cookies
• reconnect to website later –> client sends cookies to server
• server uses cookie data to personalize the webpage

Question 7

cookies - purpose

Answer 7

• authetication/verificaiton data –> allow auto-login
• session data (pickup where you left off)
• tracking user behaviour
• web preferences

Question 8

website asks for cookies? why?

Answer 8

server is asking if it can use cookies to track user behaviour

asking permission –> usually related to privacy policies

Question 9

Third party cookies

Answer 9

click on embedded ads –> generates cookies for the advertiser NOT the website

allows advertising cookies to be carried over and used on other websites

Question 10

Cookies vs incognito

Answer 10

cookies are wiped when the browser is closed

also wipes other data (cached data, history)

Question 11

website polling

Answer 11

some types of webpage data varies live in the same session –> requires webpage to update

event-driven –> user activity, webpage updates accordingly (eg webchats)

async comms polling –> client/server periodically send eachother updated info (eg stock prices)

Question 12

query strings

Answer 12

the portion of the URL after the main web link (after the “?”)

www.example.com/page?QUERY_STRING

used by client to
- view specific parts of the webpage (eg top rated vs newly submitted)
- assign unique session identifier (allow browsing a website on multiple pages at once)

Question 13

cookies vs query string

Answer 13

cookie - personalization of webbrowsing, stored by client

query string - used to identify/browse specific pages of the website simultaneously. INDEPENDANT OF COOKIES (not based on personalzation)