Explanation:In MongoDB, documents stored in a collection require a unique _id field that acts as a primary key. 3. Which of the following data type is depreciated ?
A. Double
B. String
C. Object
D. Undefined
Answer:A
Explanation:In MongoDB, documents stored in a collection require a unique _id field that acts as a primary key. 3. Which of the following data type is depreciated ?
A. Double B. String C. Object D. Undefined
Explanation: MongoDB treats some types as equivalent for comparison purposes. 4. Each data type has a corresponding number that can be used with the _______ operator to query documents by BSON type.