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Question

Which out of the following has been created by research facility of digital electronic corporation of USA ?

A
Yahoo
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B
Web crawler
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C
Alta vista
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D
All of the above
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Solution

The correct option is B Web crawler

Web crawler has been created by research facility of digital electronic corporation of USA

A web crawler (also known as a web spider or web robot) is a program or automated script which browses the World Wide Web in a methodical, automated manner. This process is called Web crawling or spidering. Many legitimate sites, in particular search engines, use spidering as a means of providing up-to-date data.

A crawler is a program that visits Web sites and reads their pages and other information in order to create entries for a search engine index. The major search engines on the Web all have such a program, which is also known as a "spider" or a "bot."

Googlebot. Googlebot is Google's web crawling bot (sometimes also called a "spider"). Crawling is the process by which Googlebot discovers new and updated pages to be added to the Google index. We use a huge set of computers to fetch (or "crawl") billions of pages on the web.

Web scraping and crawling aren't illegal by themselves. After all, you could scrape or crawl your own website, without a hitch. The problem arises when you scrape or crawl the website of somebody else, without obtaining their prior written permission, or in disregard of their Terms of Service (ToS).

A web crawler (also known as a web spider or search engine robot) is a programmed script that browses the World Wide Web in a methodical, automatic manner. This process is called as web crawling or spidering. ... Moreover, the spiders or crawlers are used for automating maintenance tasks on the web site.


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