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Exam Code:
CCA-500Exam Name: Cloudera Certified Administrator for Apache Hadoop (CCAH)
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CCA-500 Exam PDF Total Q&A: 60 Questions and Answers
Last Update: 04-22,2015
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NO.1 Which scheduler would you deploy to ensure that your cluster allows
short jobs to finish within
a reasonable time without starting long-running
jobs?
A. Complexity Fair Scheduler (CFS)
B. Capacity Scheduler
C. Fair
Scheduler
D. FIFO Scheduler
Answer: C
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Reference:
http://hadoop.apache.org/docs/r1.2.1/fair_scheduler.html
NO.2 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 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
Answer: E
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NO.3 Your company stores user
profile records in an OLTP databases. You want to join these records
with web
server logs you have already ingested into the Hadoop file system. What is the
best way to
obtain and ingest these user records?
A. Ingest with Hadoop
streaming
B. Ingest using Hive's IQAD DATA command
C. Ingest with sqoop
import
D. Ingest with Pig's LOAD command
E. Ingest using the HDFS put
command
Answer: C
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NO.4 Which YARN
daemon or service monitors a Controller's per-application resource using
(e.g.,
memory CPU)?
A. ApplicationMaster
B. NodeManager
C.
ApplicationManagerService
D. ResourceManager
Answer:
A
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NO.5 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. Oozie
B. ZooKeeper
C. HBase
D. Sqoop
E.
HUE
Answer: A
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NO.6 You are running a Hadoop cluster with MapReduce version 2
(MRv2) on YARN. You consistently
see that MapReduce map tasks on your cluster
are running slowly because of excessive garbage
collection of JVM, how do you
increase JVM heap size property to 3GB to optimize performance?
A.
yarn.application.child.java.opts=-Xsx3072m
B.
yarn.application.child.java.opts=-Xmx3072m
C.
mapreduce.map.java.opts=-Xms3072m
D.
mapreduce.map.java.opts=-Xmx3072m
Answer:
C
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Reference:
http://hortonworks.com/blog/how-to-plan-and-configure-yarn-in-hdp-2-0/
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