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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Using cloudera manager on CDH4 cluster running mapreduce V1(MRv1), you delete a tasktracker role instance from a host that also a runs a datanode role instance and a region server role instance.cloudera
Manager make changes to the cluster and prompts you to the accept the changes.
What other configuration option will cloudera manager automatically prompt you to change?

A) The option to failover to the instance by namenode
B) The option to change java maximum heap sizes for the other role instances
C) the option to specify an alternate slave host to place the received data node role instance
D) the option to immediately rebalance the cluster

2. On a cluster running MapReduce v1 (MRv1), the value of the mapred.tasktracker.map.tasks.maximum configuration parameter in the mapred-site.xml file should be set to:

A) The same value on each slave node.
B) Half the number of the maximum number of Reduce tasks which can run on the cluster as a whole.
C) The maximum number of Map tasks can run simultaneously on an individual node.
D) The maximum number of Map tasks which can run on the cluster as a whole.
E) Half the number of the maximum number of Reduce tasks which can run simultaneously on an individual node.

3. Which three file actions can execute as you write a file into HDFS?

A) You can update the files contents
B) You can index the file
C) You can move the file
D) You can delete the file
E) You can rename the file

4. Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?

A) Namenode
B) Zookeeper
C) Hmaster
D) ApplicationMaster
E) Datanode
F) Resourcemanager
G) Tasktracker

5. The most important consideration for slave nodes in a Hadoop cluster running production jobs that require short turnaround times is:

A) The ratio between the amount of memory and the number of disk drives.
B) The ratio between the number of processor cores and number of disk drives.
C) The ratio between the number of processor cores and the amount of memory.
D) The ratio between the amount of memory and the total storage capacity.
E) The ratio between the number of processor cores and total storage capacity.

Solutions: