Question 41
What is the maximum size of a MongoDB document
Question 42
What does the output x of the following MongoDB aggregation query result into; db.posts.aggregate( [ {
$group: { _id; "$author", x: { $sum: $likes } } } ] )
$group: { _id; "$author", x: { $sum: $likes } } } ] )
Question 43
In what format does mongodump creates backup files?
Question 44
What is the output of following two commands in MongoDB: db. posts. insert({n_id":l}) db.posts.insert({"_id":l})