Ensurepass  QUESTION 21 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 Read more [...]
Posted in Uncategorized.
EnsurepassQUESTION 31 Your cluster's mapred-start.xml includes the following parameters   <name>mapreduce.map.memory.mb</name>   <value>4096</value>   <name>mapreduce.reduce.memory.mb</name>   <value>8192</value>   And any cluster's yarn-site.xml includes the following parameters   <name>yarn.nodemanager.vmen-pmen-ration</name>   <value>2.1</value>   What is the maximum amount of virtual Read more [...]
Posted in Uncategorized.
Ensurepass  QUESTION 11 You have A 20 node Hadoop cluster, with 18 slave nodes and 2 master nodes running HDFS High Availability (HA). You want to minimize the chance of data loss in your cluster. What should you do?   A. Add another master node to increase the number of nodes running the JournalNode which increases the number of machines available to HA to create a quorum. B. Set an HDFS replication factor that provides data redundancy, protecting against node failure. C. Run Read more [...]
Posted in Uncategorized.
Ensurepass QUESTION 1 You are migrating a cluster from MApReduce version 1 (MRv1) to MapReduce version 2 (MRv2) on YARN. You want to maintain your MRv1 TaskTracker slot capacities when you migrate. What should you do?   A. Configure yarn.applicationmaster.resource.memory-mb and yarn.applicationmaster.resource.cpu-vcores so that ApplicationMaster container allocations match the capacity you require. B. You don't need to configure or balance these properties in YARN as YARN dynamically Read more [...]
Posted in Uncategorized.