The ____________ pattern identifies each node in the tree as stops in a round-trip traversal of the tree.(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedThis question was addressed to me by my college director while I was bunking the class.My question is from Model Tree Structures in portion Data Models of MongoDB

The ____________ pattern identifies each node in the tree as stops in

1.	The ____________ pattern identifies each node in the tree as stops in a round-trip traversal of the tree.(a) Materialized Paths(b) Array of Ancestors(c) Nested Sets(d) None of the mentionedThis question was addressed to me by my college director while I was bunking the class.My question is from Model Tree Structures in portion Data Models of MongoDB
Answer» The correct choice is (C) NESTED Sets To elaborate: The Nested Sets pattern stores each tree node in a document; in addition to the tree node, document stores the id of node’s PARENT, the node’s initial STOP in the left field, and its return stop in the RIGHT field.

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