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CCA-500 Cloudera Certified Administrator for Apache Hadoop (CCAH) Question and Answers

Question # 4

Given:

You want to clean up this list by removing jobs where the State is KILLED. What command you enter?

A.

Yarn application –refreshJobHistory

B.

Yarn application –kill application_1374638600275_0109

C.

Yarn rmadmin –refreshQueue

D.

Yarn rmadmin –kill application_1374638600275_0109

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Question # 5

Table schemas in Hive are:

A.

Stored as metadata on the NameNode

B.

Stored along with the data in HDFS

C.

Stored in the Metadata

D.

Stored in ZooKeeper

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Question # 6

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? (Choose two)

A.

HMaster

B.

ResourceManager

C.

TaskManager

D.

JobTracker

E.

NameNode

F.

DataNode

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Question # 7

Your Hadoop cluster is configuring with HDFS and MapReduce version 2 (MRv2) on YARN. Can you configure a worker node to run a NodeManager daemon but not a DataNode daemon and still have a functional cluster?

A.

Yes. The daemon will receive data from the NameNode to run Map tasks

B.

Yes. The daemon will get data from another (non-local) DataNode to run Map tasks

C.

Yes. The daemon will receive Map tasks only

D.

Yes. The daemon will receive Reducer tasks only

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Question # 8

Your cluster has the following characteristics:

  • A rack aware topology is configured and on
  • Replication is set to 3
  • Cluster block size is set to 64MB

Which describes the file read process when a client application connects into the cluster and requests a 50MB file?

A.

The client queries the NameNode for the locations of the block, and reads all three copies. The first copy to complete transfer to the client is the one the client reads as part of hadoop’s speculative execution framework.

B.

The client queries the NameNode for the locations of the block, and reads from the first location in the list it receives.

C.

The client queries the NameNode for the locations of the block, and reads from a random location in the list it receives to eliminate network I/O loads by balancing which nodes it retrieves data from any given time.

D.

The client queries the NameNode which retrieves the block from the nearest DataNode to the client then passes that block back to the client.

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Question # 9

Your cluster is configured with HDFS and MapReduce version 2 (MRv2) on YARN. What is the result when you execute: hadoop jar SampleJar MyClass on a client machine?

A.

SampleJar.Jar is sent to the ApplicationMaster which allocates a container for SampleJar.Jar

B.

Sample.jar is placed in a temporary directory in HDFS

C.

SampleJar.jar is sent directly to the ResourceManager

D.

SampleJar.jar is serialized into an XML file which is submitted to the ApplicatoionMaster

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