Explanation:If the field to rename does not exist in a document, $rename does nothing. 10. ____________ pattern requires additional steps of working with strings and regular expressions.
A. Materialized Paths
B. Array of Ancestors
C. Nested Sets
D. None of the mentioned
Answer:A
Explanation:If the field to rename does not exist in a document, $rename does nothing. 10. ____________ pattern requires additional steps of working with strings and regular expressions.
A. Materialized Paths B. Array of Ancestors C. Nested Sets D. None of the mentioned
Explanation:The Materialized Paths pattern stores each tree node in a document; in addition to the tree node, document stores as a string the id(s) of the node’s ancestors or path. Sanfoundry Global Education & Learning Series – MongoDB.