Cloudera CCA-470 : Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)

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

1. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?

A) Secondary NameNode
B) Node Manager
C) Application Manager
D) DataNode
E) NameNode
F) Resource Manager

2. You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an error.
Why is Cloudera Manager showing the concerning status KM the services?

A) A slave node's disk ran out of space
B) The slave nodes are swapping.
C) DataNode service instance has crashed.
D) The slave nodes, haven't sent a heartbeat in 60 minutes

3. 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) Given Jobs A and B submitted in that order, all tasks from job A are guaranteed to finish before all tasks from job B.
B) The FIFO Scheduler will give, on average, equal share of the cluster resources over the job lifecycle.
C) Tasks are scheduled in the order of their jobs' submission.
D) 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.
E) The order of execution of tasks within a job may vary.
F) 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.

4. What do you need to do when adding new slave nodes to a cluster?

A) Restart the NameNode daemon.
B) Increase the value of dfs.number.of.nodes in hdfs-site.xml.
C) Halt and resubmit any running MapReduce jobs to guarantee correctness.
D) Add a new entry to /etc/slavenodes on the NameNode host.
E) add the new node's DNS name to the conf/slaves file on the master node.

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

Solutions: