Regarding the where: I get mine partly from knowledge I picked up at school and university, partly from things I have learnt since and when that fails and I am sufficiently interested Google which is fine as long as you know enough about the subject to filter out the rubbish that comes with the good stuff. Regarding the when: Not sure I understand the question.
You get your answers below your question, and whenever somebody who knows the answer to your question finds it and answers it. If you want to see whether or not someone has answered your question, you can click on the 'Get Updates' link on the left sidebar. Also, you can click on 'My Contributions' on the left sidebar as well.
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depends on who answers them
It was once called Wiki Answers but now its just Answers or Answers.com
Because it gives you answers
digital answers, are answers online
Answers do not have a life, but some do. It depends on what kinds of answers
you can get answers if someone answers your questions.
They don't. It is the users who contribute the answers.
Answers or anywhere to search?
Because there are no answers.
Answers does not give test answers.
Answers does not have access to test answers.