System Design Interview: Autocomplete/Type-ahead System for a Search Box
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Autocomplete is a popular feature of search engines. As the user types something in the search box, this feature creates suggestions to complete the sentence for what the user has already typed. These suggestions come from the queries that users have already searched in that search engine and the popularity of these searches. A query that has been searched several times will appear among the top suggestions. A typeahead benefits the user by helping them form sentences faster. It’s an important part of all search engines and many search boxes as it enhances the user experience.
