Recall & Review
beginner
What is a search engine?
A search engine is a tool that helps you find information on the internet by looking through many web pages and showing you the most relevant results.
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beginner
What does a web crawler (or spider) do in a search engine?
A web crawler visits web pages on the internet, reads their content, and follows links to find more pages. It collects information to help the search engine know what is on each page.
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intermediate
Explain the role of an index in a search engine.
An index is like a giant library catalog for the internet. It stores information about web pages so the search engine can quickly find pages that match your search words.
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intermediate
How does a search engine decide which results to show first?
The search engine uses algorithms to rank pages based on factors like how often your search words appear, how trustworthy the page is, and how many other pages link to it.
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beginner
What is the basic flow of how a search engine finds and shows information?
1. The web crawler finds and reads web pages.<br>2. The index stores information about these pages.<br>3. When you search, the engine looks in the index.<br>4. It ranks pages by relevance.<br>5. It shows you the best results.
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What is the first step a search engine takes to find information on the web?
✗ Incorrect
The search engine starts by using a web crawler to visit and read web pages.
What is the purpose of the index in a search engine?
✗ Incorrect
The index acts like a catalog that helps the search engine find pages quickly.
Which factor does NOT usually affect how a search engine ranks pages?
✗ Incorrect
The color scheme does not affect ranking; content and links do.
What is a web crawler also called?
✗ Incorrect
A web crawler is often called a spider because it 'crawls' the web like a spider.
After the search engine looks in the index, what does it do next?
✗ Incorrect
The search engine ranks pages to show the most relevant results first.
Describe the main steps a search engine uses to find and show information from the web.
Think about how the search engine reads pages, remembers them, and then finds the best matches for your search.
You got /5 concepts.
Explain why a search engine uses an index instead of searching the whole web every time you search.
Imagine looking for a book in a huge library without a catalog.
You got /4 concepts.