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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Using cloudera manager on CDH4 cluster running mapreduce V1(MRv1), you delete a tasktracker role instance from a host that also a runs a datanode role instance and a region server role instance.cloudera
Manager make changes to the cluster and prompts you to the accept the changes.
What other configuration option will cloudera manager automatically prompt you to change?

A) the option to specify an alternate slave host to place the received data node role instance
B) The option to change java maximum heap sizes for the other role instances
C) the option to immediately rebalance the cluster
D) The option to failover to the instance by namenode

2. 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 order of execution of tasks within a job may vary.
C) The FIFO Scheduler will give, on average, equal share of the cluster resources over the job lifecycle.
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) 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.

3. 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) The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.
D) Reducers don't write blocks into HDFS

4. Your developers request that you enable them to use Hive on your Hadoop cluster. What do install and/or configure?

A) Install the Hive Interpreter on the client machines and all the slave nodes, and configure a shared remote Hive Metastore.
B) Install the Hive interpreter on the client machines and all nodes on the cluster
C) Install the Hive interpreter on the master node running the JobTracker, and configure a shared remote Hive Metastore.
D) Install the Hive interpreter on the client machines only, and configure a shared remote Hive Metastore.

5. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) NodeManager
B) DataNode
C) NameNode
D) TaskTracker
E) JobTracker
F) ResourceManager
G) ApplicationMaster

Solutions: