Explanation:$group consumes all input documents and outputs one document per each distinct group. 3. To handle large datasets, set _________ option to true to enable writing data to temporary files.
A. enableDiskUse
B. allowDiskUse
C. validateDiksUse
D. None of the mentioned
Answer:A
Explanation:$group consumes all input documents and outputs one document per each distinct group. 3. To handle large datasets, set _________ option to true to enable writing data to temporary files.
A. enableDiskUse B. allowDiskUse C. validateDiksUse D. None of the mentioned
Explanation:In the mongo shell, when you assign the cursor returned from the find() method to a variable using the var keyword, the cursor does not automatically iterate. 4. ________ deconstructs an array field from the input documents to output a document for each element.