Web Technologies (OCR A-Level Computer Science): Flashcards
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Practise the cards
12 cards from this deck
What is search engine indexing?
What is search engine indexing?
Organising & storing web page info for quick retrieval
Purpose of indexing
Purpose of indexing
Store info on billions of pages for quick search results
What are web crawlers (spiders)?
What are web crawlers (spiders)?
Automated programs that visit and analyse web pages
What is a search engine index?
What is a search engine index?
Massive database storing info about web pages
What info is stored in the index?
What info is stored in the index?
Keywords, metadata, and content
Why indexing helps search speed
Why indexing helps search speed
Allows quick matching of relevant results to queries
Why is searching without indexing inefficient?
Why is searching without indexing inefficient?
Would need to scan entire internet each time
What is the crawling process?
What is the crawling process?
Scanning pages, following links to discover new content
How often do crawlers revisit pages?
How often do crawlers revisit pages?
Periodically to check for updates
What is parsing in indexing?
What is parsing in indexing?
Analysing & breaking down page content into elements
Elements analysed during parsing
Elements analysed during parsing
Text, keywords, headings, images, metadata
How does the index retrieve pages?
How does the index retrieve pages?
Based on keywords in user's search query