MongoDB interview questions part 22
MongoDB interview questions part 22
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Total Questions: 20
1. For each _______ the Kerberos Key Distribution Center (KDC) maintains a database of the realm’s principal and the principals’ associated “secret keys”.
Correct Answer is : realm
2. Point out the correct statement :
Correct Answer is : All of the mentioned
3. For a client-server authentication, the client requests from the KDC a ________ for access to a specific asset.
Correct Answer is : ticket
4. To authenticate using Kerberos, you must add the Kerberos user principals to MongoDB to the _________ database.
Correct Answer is : $external
5. Point out the wrong statement :
Correct Answer is : MongoDB does not support authentication mechanisms
6. To specify a different value for , use ________ during the start up of mongod.
Correct Answer is : serviceName
7. Linux systems can store Kerberos authentication keys for a service principal in ______ files.
Correct Answer is : keytab
8. MongoDB __________ supports authentication using a Kerberos service.
Correct Answer is : Enterprise
9. On Linux, MongoDB clients can use Kerberos’s _______ program to initialize a credential cache for authenticating the user principal to servers.
Correct Answer is : kinit
10. The MongoDB _________ Console interface does not support Kerberos authentication.
Correct Answer is : HTTP
11. Which of the following database command is used for mapreduce function ?
Correct Answer is : mapReduce
12. Point out the wrong statement :
Correct Answer is : Map-reduce cannot have a finalize stage to make final modifications to the result
13. MongoDB applies the _____ phase to each input document in mapreduce.
Correct Answer is : map
14. MongoDB applies the _________ phase, which collects and condenses the aggregated data.
Correct Answer is : reduce
15. Point out the wrong statement :
Correct Answer is : None of the mentioned
16. The output of the reduce function may pass through a ______ function to further condense or process the results of the aggregation.
Correct Answer is : finalize
17. _________ can return the results of a map-reduce operation as a document, or may write the results to collections.
Correct Answer is : mapReduce
18. Map-reduce uses custom __________ functions to perform the map and reduce operations
Correct Answer is : Javascript
19. For most aggregation operations, the ______ Pipeline provides better performance and more coherent interface.
Correct Answer is : Aggregate
20. What would be the maximum document size for results of mapreduce operation ?
Correct Answer is : 16 MB
