Exam 2018

Question 1

The Internet Protocol originates from the early nineties

Answer 1

false

Question 2

The DNS (Domain Name Service) existed before the Web was invented.

Answer 2

true

Question 3

SMTP and DNS are technologies developed by Tim Berners-Lee

Answer 3

false

Question 4

The notion of “hypertext”, text with links, existed before the Web was invented.

Answer 4

true

Question 5

IPv6 (Internet Protocol version 6) is the successor of IPv4.

Answer 5

true

Question 6

The IPv4 address space can encode 2^32 addresses, while IPv6 can encode 2^128
addresses.

Answer 6

true

Question 7

192.16.196.210 is a valid IPv4 address

Answer 7

true

Question 8

The concept of a “port” in the TCP protocol is part of the IP protocol

Answer 8

false

Question 9

The World Wide Web was originally invented by the US military.

Answer 9

false

Question 10

A web server should always send back exactly the same syntactic representation
of a resource for a given URL

Answer 10

false

Question 11

The WHATWG (Web Hypertext Application Technology Working Group) sees
the HTML specification as a “Living Standard” that needs continuous maintenance as the language
evolves.

Answer 11

true

Question 12

To implement the patented HTML5 specification, browser developers need to buy a license from W3C.

Answer 12

false

Question 13

HTML5 documents represent a tree with the html element as the root of the tree.

Answer 13

true

Question 14

HTML5 is more strict about syntax details than earlier versions of HTML.

Answer 14

false

Question 15

A div element cannot have a class attribute when used as semantic markup.

Answer 15

false

Question 16

The new title element replaces the old h1 elements

Answer 16

false

Question 17

The article element is an alternative for the title element.

Answer 17

false

Question 18

Browsers normalize extra spaces when displaying an HTML file.

Answer 18

true

Question 19

The header element is used to group the header-related elements of a document
or section.

Answer 19

true

Question 20

The selector div.question indicates that a style rule should be applied to all
div elements that have a class attribute with the value "question".

Answer 20

false

Question 21

CSS3 media queries are used to write styles rules that adapt the rendering of
HTML to a wide variety of devices.

Answer 21

true

Question 22

The rule p {font-weight: bold;} is a correct CSS style rule for making p
elements bold.

Answer 22

true

Question 23

page-break-after is a CSS property intended for print media usage

Answer 23

true

Question 24

To refer to a CSS style sheet embedded in an HTML document, you can use ‘.’

Answer 24

False

Question 25

The “small world phenomenon” means that on the web, most pages are not indexed by search engines.

Answer 25

False

Question 26

If Zipf’s law applies to a corpus, then there are a few terms that appear very frequently, and a long tail with many terms that appear infrequently

Answer 26

true

Question 27

An inverted index lists for each term the document ids in which that term appears

Answer 27

true

Question 28

Heaps’ law predicts that if you index many documents, you will have quickly encountered all unique words in the collection.

Answer 28

false

Question 29

Using JavaScript host objects, you can create a pop-up window

Answer 29

true

Question 30

JavaScript has no “print” or “echo” statements as part of the language.

Answer 30

true

Question 31

The external JavaScript file must contain the tag "script"

Answer 31

false

Question 32

With JavaScript and the DOM API, you can replace the src attribute of an img element in response to a mouse click

Answer 32

true

Question 33

With JavaScript and the DOM API, you cannot remove a p element after the document has been loaded into the browser.

Answer 33

false

Question 34

The Document Object Model (DOM) models a document as a tree data structure

Answer 34

true

Question 35

The DOM API can be used in JavaScript, but also in many other programming languages.

Answer 35

false

Question 36

An event handler is a function that is called in response of a specific event (for example, a mouse click).

Answer 36

true

Question 37

To change the content of the HTML element

Anyone | there?

, you can use the Javascript line: document.getElementById("h1").innerHTML = "Hello World!"

Answer 37

false

Question 38

With AJAX technology, you can replace parts of the page without refreshing the entire page

Answer 38

true

Question 39

AJAX technology makes inaccessible sites accessible

Answer 39

false

Question 40

Websites no longer need to use cookies if they upgrade to AJAX.

Answer 40

false

Question 41

Websites no longer need to use CSS if they upgrade to AJAX.

Answer 41

false

Question 42

An HTTP server responding to an AJAX request must respond by serving the HTML representation of any requested resource

Answer 42

false

Question 43

If JavaScript code on a web page from www.siteB.com tries to sends an AJAX request to www.siteA.com, modern web browsers add a HTTP request header Origin: http://www.siteB.com/ to indicate this to site A.

Answer 43

true

Question 44

If the HTTP server is designed to be used by an AJAX client, it should never respond to HTTP POST requests.

Answer 44

false

Question 45

A drawback of AJAX is that HTTP servers can no longer use the common HTTP response codes.

Answer 45

false

Question 46

The HTTP request method must be either GET, POST or PUT.

Answer 46

false

Question 47

HTTP response codes starting with ”5” indicate a server-side error.

Answer 47

true

Question 48

HTTP requests are sent by the client, HTTP responses by the server.

Answer 48

true

Question 49

HTTP is a ”stateless” network protocol.

Answer 49

true

Question 50

To be able to successfully perform an operation on a Web resource, a Web client and server need to agree on the URL to access the resource.

Answer 50

True

Question 51

To be able to successfully perform an operation on a Web resource, a Web client and server need to agree on the HTTP method(s) allowed on the resource

Answer 51

true

Question 52

To be able to successfully perform an operation on a Web resource, a Web client and server need to agree on whether the server will generate the resource dynamically or not

Answer 52

false

Question 53

To be able to successfully perform an operation on a Web resource, a Web client and server need to agree on the acceptable representation formats of the resource

Answer 53

true

Question 54

Cross-origin resource sharing (CORS) is a mechanism to allow restricted resources on a web server to be requested by scripts on pages from another domain.

Answer 54

true

Question 55

Cookies can be used to adapt sites to the personal preferences of the user.

Answer 55

true

Question 56

Cookies are a frequent source of “Trojan horses”.

Answer 56

false

Question 57

Cookies were introduced in HTML5.

Answer 57

false

Question 58

Cookies can be used to pass on private and sensitive information.

Answer 58

true

Question 59

A responsive web document conforms to the W3C accessibility guidelines (WCAG) 2.0.

Answer 59

true

Question 60

To support screen readers, you should use the ALT tag to only indicate that this is an image. For example alt="this is a picture"

Answer 60

false

Question 61

W3C’s Web Content Accessibility Guidelines (WCAG) 2.0 deal only with visual disabilities

Answer 61

false

Question 62

In order to be completely (level AAA) compliant with W3C accessibility guidelines, one needs to create five separate versions of a web page: a normal one and one each for visually, auditory, motoric and cognitively impaired users.

Answer 62

false

Question 63

Auto-play option for videos increase accessibility of web pages.

Answer 63

false

Question 64

The goal of A/B testing is to analyze the difference in behaviour on a web page for two different user groups (for example male/female users)

Answer 64

false

Question 65

HTTP log files are typically stored client-side.

Answer 65

false

Question 66

You can make a “low-fidelity mockup” with pen and paper.

Answer 66

true

Question 67

A web site owner hypothesizes that more than 80 percent of his visitors click the first link on his page and analyzes user logs to test this. This is a typical example of a explorative study

Answer 67

False

Question 68

A web site owner hypothesizes that more than 80 percent of his visitors click the first link on his page and analyzes user logs to test this. In the above scenario, the independent variable is the link clicked, the dependent variable is the number of visitors.

Answer 68

true

Question 69

Web Science is the mathematical study of the Web.

Answer 69

false

Question 70

The term ”Web Science” was coined by Tim Berners-Lee in 1985.

Answer 70

false

Question 71

Scale-free networks (such as the Web) have nodes with on average many more in-links than out-links.

Answer 71

false

Question 72

Scale-free networks have many nodes that have few links and few nodes that have many links.

Answer 72

true

Question 73

Open Data are free to use by anyone, without payment

Answer 73

true

Question 74

If a company such as Facebook provides free Internet to a specific region, and they do not favour or slow down IP packets from specific services, they still violate Net neutrality principles as the company acts both as service and network provider.

Answer 74

false

Question 75

It is a violation of the principle of Net neutrality if Internet service providers cut off specific Web sites or services such as BitTorrent or YouTube.

Answer 75

true

Question 76

The Resource Description Framework (RDF) is a W3C standard for interchanging data on the Web

Answer 76

true

Question 77

The RDF data model uses two-valued tuples to link text strings into graphs (for example: ”Victor” - ”TeachesAtVU”).

Answer 77

false