They'd be automatically graded, and open book (or internet, but maybe not open friend) would be fine, too.
The idea would be to "force" people to think regularly about the concepts. In order to answer the question, you'd have to think about it at least a little.
I say not open friend, because I don't want the help to be of the form ABBDCABADC. No thinking would be involved. Or maybe just make the answers in random order and unlabeled. Still maybe say no friends, but if they at least clicked the answers themselves, the answer-as-label might still require thinking.
Example question (and multiple answer could be nice, and I had a recommendation that partial-credit answers could also be cool):
Which of the following are expressions of type int?
- -4 + 1