ITExamDump의 Cloudera인증 CCD-470시험덤프는 실제시험의 기출문제와 예상문제를 묶어둔 공부자료로서 시험문제커버율이 상당히 높습니다.IT업계에 계속 종사하려는 IT인사들은 부단히 유력한 자격증을 취득하고 자신의 자리를 보존해야 합니다. ITExamDump의 Cloudera인증 CCD-470시험덤프로 어려운 Cloudera인증 CCD-470시험을 쉽게 패스해보세요. IT자격증 취득이 여느때보다 여느일보다 쉬워져 자격증을 많이 따는 꿈을 실현해드립니다.
최근 더욱 많은 분들이Cloudera인증CCD-470시험에 도전해보려고 합니다. ITExamDump에서는 여러분들의 시간돠 돈을 절약해드리기 위하여 저렴한 가격에 최고의 품질을 지닌 퍼펙트한Cloudera인증CCD-470시험덤플르 제공해드려 고객님의 시험준비에 편안함을 선물해드립니다. ITExamDump제품을 한번 믿어보세요.
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시험 번호/코드: CCD-470
시험 이름: Cloudera (Cloudera Certified Developer for Apache Hadoop CDH4 Upgrade Exam (CCDH))
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Q&A: 94 문항
업데이트: 2013-11-07
ITExamDump의 Cloudera인증 CCD-470시험덤프자료는 여러분의 시간,돈 ,정력을 아껴드립니다. 몇개월을 거쳐 시험준비공부를 해야만 패스가능한 시험을ITExamDump의 Cloudera인증 CCD-470덤프는 며칠간에도 같은 시험패스 결과를 안겨드릴수 있습니다. Cloudera인증 CCD-470시험을 통과하여 자격증을 취득하려면ITExamDump의 Cloudera인증 CCD-470덤프로 시험준비공부를 하세요.
CCD-470 덤프무료샘플다운로드하기: http://www.itexamdump.com/CCD-470.html
NO.1 Which describes how a client reads a file from HDFS?
A. The client queries the NameNode for the block location(s). The NameNode returns the block
location(s) to the client. The client reads the data directory off the DataNode(s).
B. The client queries all DataNodes in parallel. The DataNode that contains the requested data
responds directly to the client. The client reads the data directly off the DataNode.
C. The client contacts the NameNode for the block location(s). The NameNode then queries the
DataNodes for block locations. The DataNodes respond to the NameNode, and the NameNode
redirects the client to the DataNode that holds the requested data block(s). The client then reads
the data directly off the DataNode.
D. The client contacts the NameNode for the block location(s). The NameNode contacts the
DataNode that holds the requested data block. Data is transferred from the DataNode to the
NameNode, and then from the NameNode to the client.
Answer: C
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NO.2 You are running a job that will process a single InputSplit on a cluster which has no other jobs
currently running. Each node has an equal number of open Map slots. On which node will Hadoop
first attempt to run the Map task?
A. The node with the most memory
B. The node with the lowest system load
C. The node on which this InputSplit is stored
D. The node with the most free local disk space
Answer: C
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NO.3 What data does a Reducer reduce method process?
A. All the data in a single input file.
B. All data produced by a single mapper.
C. All data for a given key, regardless of which mapper(s) produced it.
D. All data for a given value, regardless of which mapper(s) produced it.
Answer: C
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NO.4 What happens in a MapReduce job when you set the number of reducers to zero?
A. No reducer executes, but the mappers generate no output.
B. No reducer executes, and the output of each mapper is written to a separate file in HDFS.
C. No reducer executes, but the outputs of all the mappers are gathered together and written to a
single file in HDFS.
D. Setting the number of reducers to zero is invalid, and an exception is thrown.
Answer: B
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NO.5 You want to populate an associative array in order to perform a map-side join. You’ve decided
to
put this information in a text file, place that file into the DistributedCache and read it in your
Mapper before any records are processed.
Indentify which method in the Mapper you should use to implement code for reading the file and
populating the associative array?
A. combine
B. map
C. init
D. configure
Answer: D
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NO.6 Assuming default settings, which best describes the order of data provided to a reducer’s
reduce
method:
A. The keys given to a reducer aren’t in a predictable order, but the values associated with those
keys always are.
B. Both the keys and values passed to a reducer always appear in sorted order.
C. Neither keys nor values are in any predictable order.
D. The keys given to a reducer are in sorted order but the values associated with each key are in
no predictable order
Answer: D
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NO.7 Identify the tool best suited to import a portion of a relational database every day as files into
HDFS, and generate Java classes to interact with that imported data?
A. Oozie
B. Flume
C. Pig
D. Hue
E. Hive
F. Sqoop
G. fuse-dfs
Answer: F
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