_________ does not restrict contributions to Hadoop based implementations.
(a) Mahout
(b) Oozie
(c) Impala
(d) All of the mentioned
The question was asked during an online exam.
This is a very interesting question from Mahout with Hadoop in section Apache Spark, Flume, Lucene, Hama, HCatalog, Mahout, Drill, Crunch and Thrift of Hadoop