Question 21 : __________ define what records to select for read, update, and delete operations.
1. Query optimizer
2. Query selector
3. Update definitions
4. All of the mentioned
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Question 22 : Which of the following is used to avoid repetition of data in MongoDB schema ?
1. DeReferences
2. References
3. Cursor
4. Collectors
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Question 23 : Point out the correct statement :
1. One-to-One Relationships with embedded documents presents a data model that uses embedded documents to describe one-to-one relationships between connected data
2. One-to-One Relationships with document references presents a data model that uses embedded documents to describe one-to-one relationships between connected data
3. One-to-Many Relationships with embedded documents presents a data model that uses embedded documents to describe one-to-one relationships between connected data
4. All of the mentioned
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Question 24 : Which of the following relationship uses references to describe documents between connected data ?
1. One-to-One Relationships with Embedded Documents
2. One-to-Many Relationships with Embedded Documents
3. One-to-Many Relationships with Document References
4. None of the mentioned
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Question 25 : Which of the following field allows efficient retrieval of chunks ?
1. n
2. name
3. object
4. 2n
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Question 26 : Which of the following checks and repairs errors and inconsistencies in data storage ?
1. repairDatabase
2. repairedDatabase
3. recoverDatabase
4. all of the mentioned
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Question 27 : ___________ is the _id is of the data type chosen for the original document in files collections.
1. files._id
2. file._id
3. fileobj._id
4. none of the mentioned
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Question 28 : Which of the collection in GridFS stores the binary chunks ?
1. chunks
2. files
3. data
4. log
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Question 29 : The default chunk size is changed from 256k to 255k in version :
1. 3.0
2. 2.4.9
3. 2.4.10
4. None of the mentioned
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Question 30 : How many does collections GridFS use to store files ?
1. 1
2. 2
3. 3
4. 4
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