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Vendor: Cloudera
Exam Code: CCA-500
Exam Name: Cloudera Certified Administrator for Apache Hadoop (CCAH)
Certification: CCAH
Total Questions: 60 Q&A
Updated on: Nov 11, 2024
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You are configuring your cluster to run HDFS and MapReducer v2 (MRv2) on YARN. Which two daemons needs to be installed on your cluster's master nodes? (Choose two)
A. HMaster
B. ResourceManager
C. TaskManager
D. JobTracker
E. NameNode
F. DataNode
Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at their default, what do you need to do when adding a new slave node to cluster?
A. Nothing, other than ensuring that the DNS (or/etc/hosts files on all machines) contains any entry for the new node.
B. Restart the NameNode and ResourceManager daemons and resubmit any running jobs.
C. Add a new entry to /etc/nodes on the NameNode host.
D. Restart the NameNode of dfs.number.of.nodes in hdfs-site.xml
You use the hadoop fs put command to add a file "sales.txt" to HDFS. This file is small enough that it fits into a single block, which is replicated to three nodes in your cluster (with a replication factor of 3). One of the nodes holding this file (a single block) fails. How will the cluster handle the replication of file in this situation?
A. The file will remain under-replicated until the administrator brings that node back online
B. The cluster will re-replicate the file the next time the system administrator reboots the NameNode daemon (as long as the file's replication factor doesn't fall below)
C. This will be immediately re-replicated and all other HDFS operations on the cluster will halt until the cluster's replication values are resorted
D. The file will be re-replicated automatically after the NameNode determines it is under- replicated based on the block reports it receives from the NameNodes
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