Question 81 : MongoDB applies the _________ phase, which collects and condenses the aggregated data.
1. map
2. reduce
3. mapper
4. all of the mentioned
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Question 82 : MongoDB applies the _____ phase to each input document in mapreduce.
1. map
2. reduce
3. mapper
4. all of the mentioned
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Question 83 : Which of the following database command is used for mapreduce function ?
1. mapReduce
2. mapperRed
3. redmap
4. none of the mentioned
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Question 84 : Which of the following method is overrided by Index filters ?
1. hint
2. plan
3. execute
4. all of the mentioned
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Question 85 : Query shape consists of a combination of query, sort, and _________ specifications.
1. selection
2. projection
3. collection
4. none of the mentioned
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Question 86 : Syntax for specifying an initial batch size for the cursor is :
1. cursor: { batchSize: <string> }
2. cursor: { batchSize: <int> }
3. cur: { batchSize: <int> }
4. none of the mentioned
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Question 87 : To handle large datasets, set _________ option to true to enable writing data to temporary files.
1. enableDiskUse
2. allowDiskUse
3. validateDiksUse
4. none of the mentioned
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Question 88 : ______ can be used to iterate the cursor of document results returned by db.collection.find().
1. it
2. next
3. cur
4. none of the mentioned
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Question 89 : Cursors returned from aggregation only supports cursor methods like :
1. cursor.hasNext()
2. cursor.Next()
3. cursor.has()
4. all of the mentioned
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Question 90 : ________ calculates aggregate values for the data in a collection.
1. db.collection.aggregate
2. db.collection.agg
3. db.collection.pipeline
4. all of the mentioned
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