MongoDB Questions and Answers – Data Modeling Concepts – 1

This set of MongoDB Multiple Choice Questions & Answers (MCQs) focuses on “Data Modeling Concepts – 1”.

1. ___________ data models allow applications to store related pieces of information in the same database record.
a) Reference
b) Embedded
c) External
d) None of the mentioned
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2. Point out the correct statement.
a) With MongoDB, you cannot embed related data in a single structure or document
b) The key consideration for the structure of your documents is the decision to embed or to use references
c) Reference schema is generally known as “denormalized” models
d) None of the mentioned
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3. Embedded data model is used when you have _________ relationships between entities.
a) contains
b) isa
c) inheritance
d) all of the mentioned
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4. Normalized data models describe relationships using ___________ between documents.
a) relativeness
b) references
c) evaluation
d) none of the mentioned
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5. Point out the wrong statement.
a) Embedded data models make it possible to update related data in a single atomic write operation
b) Embedding related data in documents may lead to situations where documents grow after creation
c) With the MMAPv1 storage engine, document growth can impact write performance and lead to data fragmentation
d) All of the mentioned
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6. To interact with embedded documents, use ___________ notation to “reach into” embedded documents.
a) period
b) dot
c) comma
d) colon
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7. MongoDB using the mmapv1 storage engine has limits on the number of __________
a) namespaces
b) collections
c) documents
d) none of the mentioned
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8. To get the current number of namespaces in the mongo shell, use ________________
a) db.system.namespaces.countc()
b) db.system.namespaces.count(*)
c) db.system.namespaces.count()
d) all of the mentioned
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9. The __________ feature of collections expires documents after a period of time.
a) TEL
b) TTL
c) TPL
d) None of the mentioned
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10. Capped collections provide __________ management of inserted documents in MongoDB.
a) FIFO
b) LIFO
c) LRU
d) MRU
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