The MongoDB Aggregation Framework | Chapter 5 - Miscellaneous Aggregation
In this article i am gone to share MongoDB-University Course: The MongoDB Aggregation Framework | Chapter 5 - Miscellaneous Aggregation Quiz Answer with you..
The $out Stage
Which of the following statements is true regarding the $out stage?
- $out will overwrite an existing collection if specified.
- $out removes all indexes when it overwrites a collection.
- If a pipeline with $out errors, you must delete the collection specified to the $out stage.
- Using $out within many sub-piplines of a $facet stage is a quick way to generate many differently shaped collections.
Views
Which of the following statements are true regarding MongoDB Views?
- A view cannot be created that contains both horizontal and vertical slices.
- Inserting data into a view is slow because MongoDB must perform the pipeline in reverse.
- Views should be used cautiously because the documents they contain can grow incredibly large.
- View performance can be increased by creating the appropriate indexes on the source collection.
________________________________________________________________________________
0 Comments