CCA-410 · Question #58
Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?
The correct answer is B. Namenode E. ApplicationMaster. Hadoop is comprised of five separate daemons. Each of these daemon run in its own JVM. Following three Daemons run on Master nodes NameNode - This daemon stores and maintains the metadata for HDFS. Secondary NameNode - Performs housekeeping functions for the NameNode…
Question
Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?
Options
- AResourcemanager
- BNamenode
- CDatanode
- DTasktracker
- EApplicationMaster
- FHmaster
- GZookeeper
How the community answered
(34 responses)- A3% (1)
- B76% (26)
- D6% (2)
- F12% (4)
- G3% (1)
Explanation
Hadoop is comprised of five separate daemons. Each of these daemon run in its own JVM. Following three Daemons run on Master nodes * NameNode - This daemon stores and maintains the metadata for HDFS. * Secondary NameNode - Performs housekeeping functions for the NameNode. * JobTracker - Manages MapReduce jobs, distributes individual tasks to machines running the 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.
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