Explanation:All MongoDB collections have an index on the _id field that exists by default. 5. Point out the wrong statement :
A. MongoDB can return sorted results by using the ordering in the index
B. MongoDB defines indexes at the collection level and supports indexes on any field or sub-field of the documents in a MongoDB collection
C. Fundamentally, indexes in MongoDB is different to indexes in other database systems
D. None of the mentioned
Answer:A
Explanation:All MongoDB collections have an index on the _id field that exists by default. 5. Point out the wrong statement :
A. MongoDB can return sorted results by using the ordering in the index B. MongoDB defines indexes at the collection level and supports indexes on any field or sub-field of the documents in a MongoDB collection C. Fundamentally, indexes in MongoDB is different to indexes in other database systems D. None of the mentioned
Explanation:Indexes are special data structures that store a small portion of the collection’s data set in an easy to traverse form. 6. MongoDB also supports user-defined indexes on multiple fields called :