I'm playing on a multiplayer server in Minecraft. When I sign out of the server and close the game, do I need to have all my items stored in chests, or will items in my inventory and armor I'm wearing still be there the next time I sign in to the same server? Thank you.
Inventory saving was added a few months back so providing the server has been updated since then, and there's no additional addons that are programmed to prevent this, then yes - your inventory should be untouched when you next login.
They will still be there when you log back in.