a closed question has fixed choices for answers, open question is a free response question.
Advantages: closed questions are easier to answer and open questions give more variety.
Disadvantages: closed questions limit responses and open questions are hard to analyze due to the variety of answers.
Closed question are questions for example that usually ask you to name one thing so you can't name more that what is asked.
However with open questions you discuss and analyse what you have been given in question and you can even be asked to state your own opinion or do research.
In David P. Bradley’s “Indian Country: The Art of David Bradley’, the objects that show the relationship between modernity and tradition are the airplanes versus clouds. Indian Country: The Art of David Bradley can be seen at the Museum of Indian Arts and Culture from Feb. 15, 2015 until January 16, 2016.