Which of the following statements arc accurate in describing features of Hadoop rack awareness?
HDFS is rack aware but MapReduce daemons are not.
Rack location is considered in the HDFS block placement policy.
Hadoop gives preference to intra-rack data transfer In order to conserve bandwidth.
Even for small clusters on a single rack, configuring rack awareness will improve performance.
Configuration of rack awareness is accomplished using a configuration file. You cannot use a
rack topology script.