Explanation:ID value value must be unique in the collection, is immutable, and may be of any type other than an array. 4. User-defined indexes on multiple fields is called :
A. composite index
B. secondary index
C. compound index
D. None of the mentioned
Answer:A
Explanation:ID value value must be unique in the collection, is immutable, and may be of any type other than an array. 4. User-defined indexes on multiple fields is called :
A. composite index B. secondary index C. compound index D. None of the mentioned
Explanation:The order of fields listed in a compound index has significance. 5. Point out the wrong statement :