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

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

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

2. Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?

A) JobTracker
B) NodeManager
C) ResourceManager
D) ApplicationMaster
E) ApplicationMasterService
F) TaskTracker

3. 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.

4. You have cluster running with the FIFO Scheduler enabled. You submit a large job A to the cluster, which you expect to run for one hour. Then, you submit job B to cluster, which you expect to run a couple of minutes only.
You submit both jobs with the same priority.
Which two best describes how the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?

A) Because there is more then a single job on the cluster, the FIFO Scheduler will enforce a limit on the percentage of resources allocated to a particular job at any given time.
B) The FIFO Scheduler will give, on average, equal share of the cluster resources over the job lifecycle.
C) The order of execution of tasks within a job may vary.
D) Tasks are scheduled in the order of their jobs' submission.
E) The FIFO Schedule will pass an exception back to the client when Job B is submitted, since all slots on the cluster are in use.
F) Given Jobs A and B submitted in that order, all tasks from job A are guaranteed to finish before all tasks from job B.

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

Solutions: