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CCA-500 Exam Dumps : Cloudera Certified Administrator for Apache Hadoop (CCAH)

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Cloudera Certified Administrator for Apache Hadoop (CCAH) Questions and Answers

Question 1

You want to node to only swap Hadoop daemon data from RAM to disk when absolutely necessary. What should you do?

Options:

A.

Delete the /dev/vmswap file on the node

B.

Delete the /etc/swap file on the node

C.

Set the ram.swap parameter to 0 in core-site.xml

D.

Set vm.swapfile file on the node

E.

Delete the /swapfile file on the node

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Question 2

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

Options:

A.

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

B.

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

C.

The Mapper transfers the intermediate data immediately to the reducers as it is generated by the Map Task

D.

YARN holds the intermediate data in the NodeManager’s memory (a container) until it is transferred to the Reducer

E.

The Mapper stores the intermediate data on the underlying filesystem of the local disk in the directories yarn.nodemanager.locak-DIFS

Question 3

Which command does Hadoop offer to discover missing or corrupt HDFS data?

Options:

A.

Hdfs fs –du

B.

Hdfs fsck

C.

Dskchk

D.

The map-only checksum

E.

Hadoop does not provide any tools to discover missing or corrupt data; there is not need because three replicas are kept for each data block