Explanation:User can remove any role from any user from any database in the system. 2. Point out the wrong statement :
A. Some pipeline stages may generate new documents or filter out documents
B. $limit groups output documents by a specified operator
C. $group groups input documents by a specified identifier expression
D. None of the mentioned
Answer:A
Explanation:User can remove any role from any user from any database in the system. 2. Point out the wrong statement :
A. Some pipeline stages may generate new documents or filter out documents B. $limit groups output documents by a specified operator C. $group groups input documents by a specified identifier expression D. None of the mentioned
Explanation:$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.