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Advanced Databases (NoSQL) | Omirzak Islam
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How can you delete all documents from a collection in MongoDB?
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What method does return an array that contains all the documents from a cursor? (Select one)
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What does return TRUE if the cursor returned by the db.collection.find() query can iterate further to return more documents? (Select one)
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You have a collection that contains zip codes in the United States. Here’s a sample document from this collection:
What will the output of this aggregation pipeline be?
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The _______ operator can be used to identify an element in the array to be updated without explicitly specifying the position of the element.:
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What are the ramifications of deleting an index that is supporting a query? (Select one.)
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How to get next document in the cursor returned by the db.collection.find() method. (Select one)
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What does the $
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The $unset operator deletes a particular field: { $unset: { field1: "", ... } }. The specified value in the
$unset expression (i.e. "") does not impact the operation.
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What is the recommended order of fields in a compound index? (Select one.)
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