Question

Point out the correct statement.

(a) 2 is returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

(b) When an index covers a query, MongoDB can both match the query conditions and return the results using only the index keys

(c) Both 2 and 4 are returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

(d) All of the mentioned

This question was posed to me in examination.

I'm obligated to ask this question of Exit Codes and Statuses in portion Production Checklist, Security Concepts and Network Security of MongoDB

Answer 1

Right choice is (a) 2 is returned by mongod if there is a mismatch between hostnames specified on the command line and in the local.sources collection

The explanation is: mongod may also return this status if oplog collection in the local database is not readable.