Q. MongoDB applies the _____ phase to each input document in mapreduce.

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Q. MongoDB applies the _________ phase, which collects and condenses the aggregated data.

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Q. The output of the reduce function may pass through a ______ function to further condense or process the results of the aggregation.

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Q. _________ can return the results of a map-reduce operation as a document, or may write the results to collections.

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Q. For most aggregation operations, the ______ Pipeline provides better performance and more coherent interface.

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Q. What would be the maximum document size for results of mapreduce operation?

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Q. _______ filters the document stream to allow only matching documents to pass unmodified into the next pipeline stage.

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Q. Point out the wrong statement.

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Q. Which of the following can be used to implement field level redaction?

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Q. ________ passes the first n documents unmodified to the pipeline where n is the specified limit.

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Q. _______ reorders the document stream by a specified sort key.

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Q. Which of the following operator incorporates the functionality of $match, $sort, and $limit for geospatial data?

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Q. _____ Writes the resulting documents of the aggregation pipeline to a collection.

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Q. ________ deconstructs an array field from the input documents to output a document for each element.

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Q. Which of the following operator is related to geography of data?

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Q. Which of the following stages cannot appear multiple times in a pipeline?

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Q. Point out the correct statement.

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Q. Aggregation expressions use ______ path to access fields in the input documents.

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Q. Which of the following statement is equivalent to “$$CURRENT.<field>”?

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Q. Point out the wrong statement.

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