Explanation:The _id field may contain values of any BSON data type, other than an array. 9. Index keys that are of the _______ type are more efficiently stored in the index.
A. Materialized Paths
B. BinData
C. String
D. None of the mentioned
Answer:A
Explanation:The _id field may contain values of any BSON data type, other than an array. 9. Index keys that are of the _______ type are more efficiently stored in the index.
A. Materialized Paths B. BinData C. String D. None of the mentioned
Explanation:Most MongoDB driver clients will include the _id field and generate an ObjectId before sending the insert operation to MongoDB. 10. MongoDB uses the ________ notation to access the elements of an array and to access the fields of an embedded document.