Explanation:MongoDB does not need to examine documents from the collection to return the results. 3. _________ corresponds to the millis field returned by cursor.explain() in earlier versions of MongoDB.
A. executionMillis
B. executionTimeMillis
C. TimeMillis
D. All of the mentioned
Answer:A
Explanation:MongoDB does not need to examine documents from the collection to return the results. 3. _________ corresponds to the millis field returned by cursor.explain() in earlier versions of MongoDB.
A. executionMillis B. executionTimeMillis C. TimeMillis D. All of the mentioned
Explanation: explain.executionStats.executionTimeMillis is total time in milliseconds required for query plan selection and query execution. 4. For sharded collections, explain returns the __________ for each accessed shard.