Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce
v1 (MRv1)

A.
NodeManager

B.
TaskTracker

C.
DataNode

D.
NameNode

E.
Secondary NameNode

F.
JobTracker

Explanation:
A TaskTracker is a slave node daemon in the cluster that accepts tasks (Map,
Reduce and Shuffle operations) from a JobTracker.
The following two daemons run on each Slave nodes:
* DataNode – Stores actual HDFS data blocks.
* TaskTracker – Responsible for instantiating and monitoring individual Map and Reduce tasks.
24 Interview Questions & Answers for Hadoop MapReduce developers, How many
Daemon processes run on a Hadoop system?