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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

1. Choose three reasons why should you run the HDFS balancer periodically?

A) To help HDFS deliver consistent performance under heavy loads.
B) To ensure that all blocks in the cluster are 128MB in size.
C) To ensure that there is consistent disk utilization across the DataNodes.
D) To ensure that there is capacity in HDFS tor additional data.
E) To improve data locality for MapReduce tasks.

2. Which three processes does HDFS High Availability (HA) enable on your cluster?

A) Write data to two clusterssimultaneously
B) Automatically 'fail over' between NameNodes if one goes down
C) Manually 'fail over' between NameNodes
D) Shut one NameNode down for maintenance without halting the cluster
E) Configure unlimited hot standby NameNode.

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

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

4. Which three distcp features can you utilize on a Hadoop cluster?

A) Use distcp to run an internal MapReduce job to copy files.
B) Use distcp to copy data between directories inside the same cluster.
C) Use distcp to copy HBase table files.
D) Use distcp to copy files only between two clusters or more. You cannot use distcp to copy data between directories inside the same cluster.
E) Use distcp to copy physical blocks from the source to the target destination in your cluster.

5. Which scheduler would you deploy to ensure that your cluster allows short jobs to finish within a reasonable time without starving long-running jobs?

A) FIFO Scheduler
B) Fair Scheduler
C) Capacity Scheduler
D) Completely Fair Scheduler (CFS)

Solutions: