MongoDB interview questions part 38
MongoDB interview questions part 38
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Total Questions: 20
1. Which of the following will display complete list of available cursor flags ?
Correct Answer is : cursor.addOption()
2. To describe the message structure, a ________ like struct is used.
Correct Answer is : C
3. Point out the wrong statement :
Correct Answer is : All of the mentioned
4. ______________ specifies the number of documents to return in each batch of the response from the MongoDB instance.
Correct Answer is : cursor.batchSize(size)
5. The __________ method returns a document that includes a metrics field.
Correct Answer is : db.serverStatus()
6. ____________ is a client or database-generated identifier that uniquely identifies this message.
Correct Answer is : requestID
7. Which of the following operator is not very selective ?
Correct Answer is : $nin
8. An index cannot cover a query on a _______ collection when run against a mongos if the index does not contain the shard key.
Correct Answer is : sharded
9. The architecture of a replica set affects the set’s _________ and capability.
Correct Answer is : capacity
10. Point out the wrong statement :
Correct Answer is : Even number of members ensures that the replica set is always able to elect a primary
11. The standard replica set deployment for production system is a ___-member replica set.
Correct Answer is : three
12. _________ for a replica set is the number of members that can become unavailable and still leave enough members in the set to elect a primary.
Correct Answer is : Fault tolerance
13. Point out the correct statement :
Correct Answer is : Fault tolerance is an effect of replica set size, but the relationship is not direct
14. Without a primary, a replica set cannot accept ________ operations.
Correct Answer is : write
15. _________ member is used to support dedicated functions, such as backup or reporting.
Correct Answer is : Hidden
16. To protect your data if your main data center fails, keep at least _______ member in an alternate data center.
Correct Answer is : one
17. What should be the priority of member to prevent them from becoming primary ?
Correct Answer is : 0
18. _________ sets also allow the routing of read operations to specific machines.
Correct Answer is : Tag
19. Replica sets provide high availability using automatic ________
Correct Answer is : failover
20. Point out the wrong statement :
Correct Answer is : MongoDB attempts for rollbacks, which should be rare
