MCQOPTIONS
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| 1. |
What is true about $group stages in aggregation framework ? |
| A. | This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage. |
| B. | This does the actual aggregation |
| C. | Sorts the documents |
| D. | None of the above |
| Answer» C. Sorts the documents | |