MongoDB interview questions part 40
MongoDB interview questions part 40
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Total Questions: 20
1. All other instances, secondaries, apply operations from the _________ so that they have the same data set.
Correct Answer is : primary
2. A replica set can have only ________ primary.
Correct Answer is : One
3. Point out the wrong statement :
Correct Answer is : In all cases, you can use replication to increase read capacity
4. To support replication, the primary records all changes to its data sets in its _______.
Correct Answer is : oplog
5. You may add an extra mongod instance to a replica set as an :
Correct Answer is : arbiter
6. An arbiter will always be an arbiter whereas a primary may step down and become a secondary and a _________ may become the primary during an election.
Correct Answer is : secondary
7. When a primary does not communicate with the other members of the set for more than ____ seconds, the replica set will attempt to select another member to become the new primary.
Correct Answer is : 10
8. When a replica set has one and only one primary, reads from that primary provide ______ consistency.
Correct Answer is : strict
9. _________ shut down the mongod instance for one of the non-primary members of your replica set.
Correct Answer is : db.shutdownServer()
10. Point out the wrong statement:
Correct Answer is : None of the mentioned
11. To finish the rolling maintenance operation, step down the primary with the _________ method
Correct Answer is : rs.stepDown()
12. You also can force a member never to become primary by setting its priority value to :
Correct Answer is : 0
13. Point out the correct statement :
Correct Answer is : All of the mentioned
14. A replica set member becomes _________ when its replication process falls so far behind that the primary overwrites oplog entries the member has not yet replicated.
Correct Answer is : stale
15. During initial sync, mongod will remove the content of the _______.
Correct Answer is : dbPath
16. You cannot use a _________backup for the data files, only a snapshot backup.
Correct Answer is : mongodump
17. You can use the ________ setting in Replica Set Configuration to disable chained replication for situations where chained replication is causing lag.
Correct Answer is : chainingAllowed
18. For most replica sets, the hostnames in the _________ field never change.
Correct Answer is : host
19. Which of the following ddds an arbiter to a replica set ?
Correct Answer is : rs.addArb()
20. Point out the wrong statement:
Correct Answer is : rs.init() initializes a new replica set
