__________ references the root document, i.e. the top-level document, currently being processed in the aggregation pipeline stage.
A. CURRENT
B. ROOT
C. PRUNE
D. All of the mentioned
Answer:A
__________ references the root document, i.e. the top-level document, currently being processed in the aggregation pipeline stage.
A. CURRENT B. ROOT C. PRUNE D. All of the mentioned
Explanation:CURRENT is modifiable. 2. Point out the wrong statement :