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How is the Hot/Active question algorithm implemented?

Is it based on the number of:

  • Views
  • Answers
  • Votes
  • Comments
  • Something else

How did StackOverflow implement a reliable algorithm for this?

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2 Answers 2

Questions start out at the top of the 'Active' tab when they are first posted. A question will be "bumped" back to the top of the 'Active' tab whenever it receives a new answer, a tag is added or removed, or one of the questions/answers is edited.

The algorithm to determine 'Hot' questions is discussed here: How are “Hot” Questions Selected?

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I moved the Hot algorithm question here

What formula should be used to determine "hot" questions?

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