To get the current number of namespaces in the mongo shell, use ___________

A)  db.system.namespaces.count()
B)  db.system.namespaces.countc()
C)  db.system.namespaces.count(*)
D)  All of the above

Correct Answer :   db.system.namespaces.count()

Explanation : The limit on the number of namespaces depend on the <database>.ns size.

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