Practice Document Databases (19.3.2) - Advanced SQL and NoSQL for Data Science

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9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is BSON?
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Think about how JSON is structured and what it might look like in a binary format.
Question 2.
Name one advantage of using document databases.
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Consider the importance of changing data structures.
3Question 3.
What type of data structure does MongoDB primarily use?
- XML
- BSON
- CSV
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Think of the format that allows for storing complex data.
4Question 4.
True or False: Document databases require a fixed schema.
- True
- False
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Consider the flexibility of document structures.
Question 5.
Design a MongoDB schema for an online tutorial application that has courses with varying numbers of lessons and reviews.
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Consider nested arrays for lessons and reviews.
Question 6.
Build a query to retrieve all tutorials with an average rating greater than 4 from a MongoDB collection.
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Think about using the aggregation framework to compute the average.

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