The search engine www. Yahoo.com is powered by Google, it works as a directory. Yahoo is a subject index, which is known as hierarchical it enables the user to go down from the most common to the most precise. it is a place where human editors arrange web sites into categories.
Yahoo uses its own search technology. With Yahoo the user can use tabs that are above the search entry box on Yahoo home page to search for images, Yellow Page listings or use Yahoo's excellent shopping engine. Yahoo has its very own searching abilities meaning the user can search the Yahoo index. if the user's question does not get any hits as Yahoo index does not search the entire web, this type of search engine gives the user an option, this option is searching the Alta Vista. With this the entire web is searched. Yahoo has an ability to work as a meta-search engine as it automatically will feed the user's question to other key search engines that's if the user wishes.
One advantage of this seraching method is that it has an easy to use interface and an easy to navigate subject catalogue.
One disadvantage of this searching method is that this type of search engine is not clear how the search results are categorised as it only returns quite few number of hits.
b) Describe how the www. Google. com search engine works and give one advantage and one disadvantage in this method of searching?
The search engine Google is known as a crawler-based search engine. This type of search engine works by creating its listings automatically meaning it 'crawls' or 'spiders' the web first, it basically takes a snapshot of each page and considers it to examine the page's importance which then the users are able to search through of what has been found by them. It also has a large index of keywords where those words can easily be found. When the user types in keywords in Google, this search engine transfers to its database and shows all the results of that particular keywords entered by the user.
Google uses a special trademarked algorithmn known as 'PageRank'. This algorithmn gives each web page an importance score.
One advantage of this searching method is that the user's search cover's more than 8 billion URLs as the google index consists of more than 8 billion URLs meaning for an result to return is obvious.
One disadvantage of this searching method is that spam and unwanted results are becoming average.
c) In your view explain which search engine you prefer to use when searching the web and justify why you have this preference?
The search engine i prefer to use when searching the web is Google as this gives out faster, accurate and signifcant results. Also Google produces results which match with all of your search names both in the text of the page or in the text of the links pointing to the page unlike Yahoo search engine. This Saves you from causing you frustration of viewing huge number of results that according to you have got nothing to do with your seach name.
References:
How search engines work (Google)
http://searchenginewatch.com/showPage.html?page=2168031 [Viewed: 25/10/08]
The Spider's Apprentice (Yahoo)
http://www.monash.com/spidap3.html [Viewed: 24/10/08]
How Yahoo search engine works
http://searchenginewatch.com/showPage.html?page=2156221
[Viewed: 24/10/08]
http://computer.howstuffworks.com/google1.htm [Viewed: 25/10/08]
Advantages of google search
http://www.google.co.uk/technology/whyuse.html [Viewed: 25/10/08]
Advantages and disadvantages of google
http://www.resource-zone.com/forum/showthread.php?t=13285 [Viewed: 25/10/08]
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