Explanation:Aggregate provides a special reducer class and a special combiner class, and a list of simple aggregators that perform aggregations such as “sum”, “max”, “min” and so on over a sequence of values. 10.Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.
A. Copy
B. Cut
C. Paste
D. Move
Answer:A
Explanation:Aggregate provides a special reducer class and a special combiner class, and a list of simple aggregators that perform aggregations such as “sum”, “max”, “min” and so on over a sequence of values. 10.Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.
A. Copy B. Cut C. Paste D. Move
Explanation:The map function defined in the class treats each input key/value pair as a list of fields.