You are configuring a server running HDFS, MapReduce version 2 (MRv2) on YARN running
Linux. How must you format underlying file system of each DataNode?
A.
They must be formatted as HDFS
B.
They must be formatted as either ext3 or ext4
C.
They may be formatted in any Linux file system
D.
They must not be formatted – – HDFS will format the file system automatically