Cloudera CCA-505 : Cloudera Certified Administrator for Apache Hadoop (CCAH) CDH5 Upgrade Exam

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Cloudera CCA-505 시험 개요:

Cloudera CCA-505 시험 요강 주제:

Cloudera Certified Administrator for Apache Hadoop (CCAH) CDH5 Upgrade 궁금증 총정리

최신 CCAH CCA-505 무료샘플문제

문제 #1

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

A. The Mapper stores the intermediate data on the mode running the job's ApplicationMaster so that is available to YARN's 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]sppcache/application_&(appid) directory for the user who ran the job
C. The Mapper stores the intermediate data on the underlying filesystem of the local disk in the directories yarn.nodemanager.local-dirs
D. The Mapper transfers the intermediate data immediately to the Reducers as it generated by the Map task
E. YARN holds the intermediate data in the NodeManager's memory (a container) until it is transferred to the Reducers

문제 #2

You suspect that your NameNode is incorrectly configured, and is swapping memory to disk. Which Linux commands help you to identify whether swapping is occurring? (Select 3)

A. vmstat
B. free
C. df
D. top
E. memcat
F. swapinfo

문제 #3

On a cluster running CDH 5.0 or above, you use the hadoop fs -put command to write a 300MB file into a previously empty directory using an HDFS block of 64MB. Just after this command has finished writing 200MB of this file, what would another use see when they look in the directory?

A. They will see the file with a ._COPYING_extension on its name. If they attempt to view the file, they will get a ConcurrentFileAccessException until the entire file write is completed on the cluster.
B. The directory will appear to be empty until the entire file write is completed on the cluster
C. They will see the file with a ._COPYING_ extension on its name. if they view the file, they will see contents of the file up to the last completed block (as each 64MB block is written, that block becomes available)
D. They will see the file with its original name. if they attempt to view the file, they will get a ConcurrentFileAccessException until the entire file write is completed on the cluster

문제 #4

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

A. SampleJar.Jar is placed in a temporary directly in HDFS
B. SampleJar.jar is sent to the ApplicationMaster which allocation a container for Sample.jar
C. SampleJar.Jar is sent directly to the ResourceManager
D. SampleJar.Jar is serialized into an XML file which is submitted to the ApplicationMaster

문제 #5

You want to understand more about how users browse you public website. For example, you want to know which pages they visit prior to placing an order. You have a server farm of 200 web servers hosting your website. Which is the most efficient process to gather these web server logs into your Hadoop cluster for analysis?

A. Sample the web server logs web servers and copy them into HDFS using curl
B. Ingest the server web logs into HDFS using Flume
C. Channel these clickstream into Hadoop using Hadoop Streaming
D. Import all users clicks from your OLTP databases into Hadoop using Sqoop
E. Write a MApReduce job with the web servers from mappers and the Hadoop cluster nodes reducers

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