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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?

A) JBOD
B) RAID 5
C) RAID 10
D) RAID 1+0

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

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

A) NameNode
B) Secondary NameNode
C) JobTracker
D) DataNode
E) TaskTracker
F) NodeManager

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

5. Which two features does Kerberos security add to a Hadoop cluster?

A) Root access to the cluster for users hdfs and mapred but non-root acess clients
B) Encryption for data on disk ("at rest")
C) Encryption on all remote procedure calls (RPCs)
D) User authentication on all remote procedure calls (RPcs)
E) Authentication for user access to the cluster against a central server

Solutions: