MongoDB interview questions part 12
MongoDB interview questions part 12
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Total Questions: 20
1. Normalized data models describe relationships using ___________ between documents.
Correct Answer is : references
2. Point out the wrong statement :
Correct Answer is : All of the mentioned
3. To interact with embedded documents, use ___________ notation to “reach into” embedded documents.
Correct Answer is : dot
4. MongoDB using the mmapv1 storage engine has limits on the number of __________ .
Correct Answer is : namespaces
5. To get the current number of namespaces in the mongo shell, use :
Correct Answer is : db.system.namespaces.count()
6. The __________ feature of collections expires documents after a period of time.
Correct Answer is : TTL
7. Capped collections provide __________ management of inserted documents in MongoDB.
Correct Answer is : FIFO
8. _______________ is a specification for storing and retrieving files that exceed the BSON-document size limit of 16MB.
Correct Answer is : GridFS
9. Point out the wrong statement :
Correct Answer is : GridFS is useful only for storing files that exceed 16MB
10. How many does collections GridFS use to store files ?
Correct Answer is : 2
11. The default chunk size is changed from 256k to 255k in version :
Correct Answer is : 2.4.9
12. Point out the wrong statement :
Correct Answer is : All of the mentioend
13. Which of the collection in GridFS stores the binary chunks ?
Correct Answer is : chunks
14. ___________ is the _id is of the data type chosen for the original document in files collections.
Correct Answer is : files._id
15. Which of the following checks and repairs errors and inconsistencies in data storage ?
Correct Answer is : repairDatabase
16. The files_id field contains the _id of the chunk’s __________ document.
Correct Answer is : parent
17. Which of the following field allows efficient retrieval of chunks ?
Correct Answer is : n
18. ________ store the relationships between data by including links or references from one document to another.
Correct Answer is : References
19. Point out the correct statement :
Correct Answer is : Data in MongoDB has a flexible schema
20. In MongoDB, write operations are atomic at the __________ level.
Correct Answer is : document
