CCA-500 by Cloudera Valid Free Exam Practice Test

Question 1

You are working on a project where you need to chain together MapReduce, Pig jobs. You also need the ability to use
forks, decision points, and path joins. Which ecosystem project should you use to perform these actions?

A. HUE B. ZooKeeper C. Oozie D. Sqoop E. HBase

Correct Answer: C

Question 2

Identify two features/issues that YARN is designated to address:

A. Standardize on a single MapReduce API B. HDFS latency C. Single point of failure in the NameNode D. Reduce complexity of the MapReduce APIs E. Ability to run framework other than MapReduce, such as MPI F. Resource pressure on the JobTracker

Correct Answer: C,F

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Question 3

You are configuring your cluster to run HDFS and MapReducer v2 (MRv2) on YARN. Which two daemons needs to be installed on your cluster's master nodes?

A. ResourceManager B. HMaster C. JobTracker D. DataNode E. NameNode F. TaskManager

Correct Answer: C,E

Question 4

You're upgrading a Hadoop cluster from HDFS and MapReduce version 1 (MRv1) to one running HDFS and MapReduce
version 2 (MRv2) on YARN. You want to set and enforce version 1 (MRv1) to one running HDFS and MapReduce
version 2 (MRv2) on YARN. You want to set and enforce a block size of 128MB for all new files written to the cluster
after upgrade. What should you do?

A. Set dfs.block.size to 128 M on all the worker nodes and client machines, and set the parameter to final. You do not
need to set this value on the NameNode B. Set dfs.block.size to 134217728 on all the worker nodes and client machines, and set the parameter to final. You do
not need to set this value on the NameNode C. Set dfs.block.size to 128M on all the worker nodes, on all client machines, and on the NameNode, and set the
parameter to final D. You cannot enforce this, since client code can always override this value E. Set dfs.block.size to 134217728 on all the worker nodes, on all client machines, and on the NameNode, and set the
parameter to final

Correct Answer: A

Question 5

You are running a Hadoop cluster with a NameNode on host mynamenode, a secondary NameNode on host
mysecondarynamenode and several DataNodes.
Which best describes how you determine when the last checkpoint happened?

A. Connect to the web UI of the NameNode (http://mynamenode:50070) and look at the "Last Checkpoint"
information B. Execute hdfs dfsadmin -saveNamespace on the command line which returns to you the last checkpoint value in
fstime file C. Execute hdfs namenode -report on the command line and look at the Last Checkpoint information D. Connect to the web UI of the Secondary NameNode (http://mysecondary:50090/) and look at the "Last
Checkpoint" information

Correct Answer: B

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Question 6

During the execution of a MapReduce v2 (MRv2) job on YARN, where does the Mapper place the intermediate data of
each Map Task?

A. The Mapper stores the intermediate data on the underlying filesystem of the local disk in the directories
yarn.nodemanager.locak-DIFS B. YARN holds the intermediate data in the NodeManager's memory (a container) until it is transferred to the Reducer C. The Mapper stores the intermediate data on the node running the Job's ApplicationMaster so that it is available to
YARN ShuffleService before the data is presented to the Reducer D. The Mapper transfers the intermediate data immediately to the reducers as it is generated by the Map Task E. The Mapper stores the intermediate data in HDFS on the node where the Map tasks ran in the HDFS
/usercache/&(user)/apache/application_&(appid) directory for the user who ran the job

Correct Answer: D

Cloudera Certified Administrator for Apache Hadoop (CCAH) - CCA-500 Exam Practice Test