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

1. Your Hadoop cluster has 12 slave nodes, a block size set to 64MB, and a replication factor of three.
Choose which best describes how the Hadoop Framework distributes block writes into HDFS from a Reducer outputting a 150MB file?

A) The Reducer will generate nine blocks and write them randomly to nodes throughout the cluster.
B) The slave node on which the Reducer runs gets the first copy of every block written. Other block replicas will be placed on other nodes.
C) Reducers don't write blocks into HDFS
D) The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.

2. Hadoop provider web interface can be used for all of the following EXCEPT: (choose 1)

A) Keeping track of processor and memory utilization on each individual slave node.
B) Keeping track of tasks running on each individual slave node.
C) Keeping track of jobs running on the cluster.
D) Browsing files in HDFS.
E) Keeping track of the number of files and directories stored in HDFS.

3. For each job, the Hadoop framework generates task log files. Where are Hadoop's task log files stored?

A) Cached on the local disk of the slave node running the task, then purged immediately upon task completion.
B) Cached on the local disk of the slave node running the task, then copied into HDFS.
C) In HDFS, in the directory of the user who generates the job.
D) On the local disk of the slave node running the task.

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

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

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

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

Solutions: