Identify two features/issues that YARN is designated to address:
A.
Standardize on a single MapReduce API
B.
Single point of failure in the NameNode
C.
Reduce complexity of the MapReduce APIs
D.
Resource pressure on the JobTracker
E.
Ability to run framework other than MapReduce, such as MPI
F.
HDFS latency
Explanation:
http://www.revelytix.com/?q=content/hadoop-ecosystem(YARN, first para)