A: Legally? Rarely. You can find "Menschen A2" or "Begegnungen A2" sample chapters for free. For the full book, you likely need to buy it. The worksheets linked above are better for targeted practice than a whole textbook anyway.
No, because there are few tables and many guests; you must call beforehand. Goethe-Institut specific grammar topic , like the Dative case or Perfekt tense? Practice materials for Goethe Certificate A2 exam deutsch a2 ubungen pdf mit losungen free