Chapter 5

Question 1

Some web pages are “invisible.” That is, no search engine will return them in a query. Why do these pages exist?

Answer 1

No other web page links to them. They are synthetic. They are file types browsers don’t understand.

Question 2

The main responsibility of a crawler is to

Answer 2

Build a list of tokens that are associated with each page

Question 3

When picking additional sources you should choose

Answer 3

Independent Sources

Question 4

Enclosing search terms in quotes asks for pages with

Answer 4

The search terms in the exact order as written

Question 5

Google usually ignores numbers. What symbol could you add to a query to make sure Google uses the number as part of the query?

Answer 5

+ the plus sign

Question 6

When searching on Google, this is the same as using the AND keyword.

Answer 6

& the and symbol

Question 7

A primary source is

Answer 7

A person with direct knowledge

Question 8

Who is in charge of the World Wide Web?

Answer 8

NO ONE

Question 9

When should a researcher be skeptical of a primary source?

Answer 9

Always, the researcher should verify the information from other sources

Question 10

After finding the web page you want, what is the next question you should ask yourself?

Answer 10

Is the information authorative?

Question 11

The higher the______ is, the closer to the top of the list a web page will be in the returned results of a search query.

Answer 11

Page Rank

Question 12

____ in Google search queries are interpreted as AND.

Answer 12

Spaces

Question 13

The main work of the_____ is to build an index.

Answer 13

Crawler

Question 14

If a web page meets all the authoritative rules given in this chapter, it can still contain______information.

Answer 14

False

Question 15

_____ is the keyboard shortcut for finding certain words on a web page.

Answer 15

Ctrl+F or Command+F

Question 16

Treating query terms as independent is almost_____what you actually want.

Answer 16

Always

Question 17

Wikipedia is validated by

Answer 17

NO ONE

Question 18

Crawlers crawl less than ____ of the Web

Answer 18

Half

Question 19

To find corroborating information on the Web, you should always_____with another independent web page.

Answer 19

Cross Check - Validate

Question 20

Wikipedia is not considered a _____ source.

Answer 20

Credible

Question 21

Why do we need search engines? What do search engines do? Answer both of these questions in great detail.

Answer 21

Web content is not organized and search engines look around and organize what they find.

Question 22

Explain what a crawler is and what it does.

Answer 22

is a software that crawls the web pages (part of a search engine) -has a to-do list, visits every web page it can find, and builds an index (list of tokens)

Question 23

Explain why in the past physical books were trusted much more than web pages are trusted today

Answer 23

Physical books went through a detailed process involving many experts. anyone can post anything on a web page.

Question 24

Explain the differences between the AND and OR logical operators and when you should use them in web searches.

Answer 24

When using AND, all terms must be on the page; when using OR, at least one or more terms can be on the page. whenever you can.

Question 25

What is an independent source, and why is it important to use independent sources when researching?

Answer 25

The information that has no direct link to the actual publisher/author. explores a new perspective of the same content, can not be subject to plagiarism

Question 26

Give three examples of when you would want to use quotes around your search query.

Answer 26

book titles, quotations, music lyrics

Question 27

What is a cached page and how is it useful?

Answer 27

A web page that is temporarily saved and stored by a web server as a backup copy. It's useful if the original page is not open due to the website being down and stored on powerful web servers so can get data fast

Question 28

Provide at least two concrete examples of when you would want to limit the domain of your web search.

Answer 28

You know where to find the information and you know that the organization is an educational institution.

Question 29

What are the pros and cons of using Wikipedia to find information?

Answer 29

pros: covers a number of topics, can be found just about anything, articles are added quite quickly after something happens or something new comes out. cons: not accurate, authors aren't experts necessarily, no one can validate it

Question 30

Use the search query “HTML quick reference” in your preferred search engine. Then describe each part of the first result found including page title, snippet, URL, cached page, and site links.

Answer 30

google: page title is quick HTML reference, the snippet is a tag list with explanations covering the HTML 3.2 version, the URL is www.htmlgoodies.com/.../refernce/article.../quick-HTML-reference..., and one of the site links is top.

Question 31

What are the rules for Intersecting Alphabetized Lists? How are they used to implement search queries?

Answer 31

rules: put a marker at the start of each tokens index list, if all markers point to URL save it, move the markers to the next position for whichever URL is earliest in the alphabet, repeat points 2 and 3 until marker reaches the end of the list -locate pages, make intersecting multiple lists, notice when URLs are the same on lists