Frequently Asked Questions (FAQ's)
Question: 
What is a door?
  Answer: A door is a movable barrier to an opening in the wall.
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Question: 
How are doors moved to open and close them?
  Answer: Doors swing on hinges or slides in grooves or rotate around.
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Question: 
What is the purpose of a door?
  Answer: A door is used for opening and closing an entrance or exit to a room or building.
   Note: This may prevent going in or out without permission.
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Question: 
What is the purpose of a locked door?
  Answer: A locked door prevents going in or out without permission.
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