Explanation: The input and the output collections may be sharded. 7. _________ can return the results of a map-reduce operation as a document, or may write the results to collections.
A. mapReduce
B. mapperRed
C. RedMap
D. None of the mentioned
Answer:A
Explanation: The input and the output collections may be sharded. 7. _________ can return the results of a map-reduce operation as a document, or may write the results to collections.
A. mapReduce B. mapperRed C. RedMap D. None of the mentioned
Explanation:Map-reduce operations take the documents of a single collection as the input and can perform any arbitrary sorting and limiting before beginning the map stage. 8. Map-reduce uses custom __________ functions to perform the map and reduce operations