Read Concern and Read Preferences

Are Read Preferences set automagically then or is it something that the application has to set depending on the situation?

As mentioned during the course, if we shutdown 2 of 3, we end up with a node that is a secondary. What can you do with the ‘surviving’ secondary node? Can you read write on it? From the course, it says do rs.slaveOk to read the data, I presume you can only do read only on the last surviving secondary node? Presumably, there is a way to make it primary and read/write, maybe just not covered on this course? :slight_smile: