1.3.4 Web Technologies Flashcards
What is HTML?
The language that web pages are written in
What is the function of <html>?
All code written within is interpreted as HTML
What is the function of <body>?
Defines content in the main browser content area
What is the function of <link></link>?
Used to link to a CSS stylesheet
What is the function of <head>?
Defines the browser tab
What is the function of <title>?</title>
Defines the title of the document
What is the function of <h1>, <h2> ..?
Heading styles in decreasing sizes
What is the function of <p>?
A paragraph separated with a line space above and below
What is the function of <img></img>?
Self closing image with parameters
How is the <img></img> tag used?
<img></img>
What is the function of <a>?</a>
Anchor tag defining hyperlinkg with location parameters
How is the <a> tag used?</a>
<a> link text </a>
What is the function of <ol>?
Defines an ordered list
What is the function of <ul>?
Defines an unordered list
What is the function of <li>?
Defines an individual list item
What is the function of <div>?
Creates division of a page into separate areas which can be identified by a unique name
How is the <div> tag used?
<div>
</div>
How are classes defined using HTML?
With full stop as prefix to class name
How are identifiers defined using HTML?
With an initial hashtag
What is CSS?
A language used to describe the style of the webpage
What is internal/embedded CSS?
Placed inside style tags entered directly within the HTML document
What is external CSS?
Placed inside external style sheet linked to HTML document
What is JavaScript?
A language that adds interactivity to websites
What is a search engine?
A program that searches through a database of Internet addresses looking for resources based on a criteria set by client
What are web crawlers?
Programs that collect information by traversing Internet webpage by webpage looking for linked sites
What information do web crawlers collect?
Keywords & phrases from web page
Meta data
What is the purpose of the PageRank algorithm?
Ranks each webpage
Higher ranked pages will show first on search engine
State the 2 factors which determine the page rank of a page.
The number of incoming links from other web pages
Page rank of linked web pages
What is the algorithm for PageRank?
PageRank(x) = (1-d) + d[(PageRank(T1) / Count(T1)) + … + (PageRank(Tn) / Count(Tn))]
What is the dampening factor in the PageRank algorithm?
Probability surfer will click through to the page
What is the purpose of a dampening factor in the PageRank algorithm?
Stops page rank of linked pages from having too much effect
What is server side processing?
When a client sends data to a server for it to be processed
No information is processed on the client computer
Give three advantages of server side processing.
Can perform large calculations faster
Not browser dependent
More secure
What is client side processing?
When a client process the data on its local device
All information processed on client computer
Give 2 advantages to client side processing.
Webpage gives immediate response to user actions
Gives developers more control over website
