Apache-Hadoop-Developer Test Answers, HDPCD Bootcamp

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Exam Code: Apache-Hadoop-Developer
Exam Name: Hadoop 2.0 Certification exam for Pig and Hive Developer
One year free update, No help, Full refund!
Apache-Hadoop-Developer Test Answers Total Q&A: 110 Questions and Answers
Last Update: 2016-07-02

Apache-Hadoop-Developer Training online Detail: Apache-Hadoop-Developer Test Answers

 
Exam Code: HDPCD
Exam Name: Hortonworks Data Platform Certified Developer
One year free update, No help, Full refund!
HDPCD Bootcamp Total Q&A: 110 Questions and Answers
Last Update: 2016-07-02

HDPCD Real Exams Detail: HDPCD Bootcamp

 

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NO.1 You want to run Hadoop jobs on your development workstation for testing before you submit
them to your production cluster.
Which mode of operation in Hadoop allows you to most closely simulate a production cluster while
using a single machine?
A. Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.
B. Run simldooop, the Apache open-source software for simulating Hadoop clusters.
C. Run all the nodes in your production cluster as virtual machines on your development workstation.
D. Run the hadoop command with the -jt local and the -fs file:///options.
Answer: A

Apache-Hadoop-Developer Real Questions   

NO.2 All keys used for intermediate output from mappers must:
A. Implement WritableComparable.
B. Implement a splittable compression algorithm.
C. Implement a comparator for speedy sorting.
D. Override isSplitable.
E. Be a subclass of FileInputFormat.
Answer: A

Apache-Hadoop-Developer test questions   
Explanation:
The MapReduce framework operates exclusively on <key, value> pairs, that is, the framework views
the input to the job as a set of <key, value> pairs and produces a set of <key, value> pairs as the
output of the job, conceivably of different types.
The key and value classes have to be serializable by the framework and hence need to implement the
Writable interface. Additionally, the key classes have to implement the WritableComparable interface
to facilitate sorting by the framework.
Reference: MapReduce Tutorial

Posted 2016/7/3 12:04:51  |  Category: Hortonworks  |  Tag: Apache-Hadoop-Developer Test QuestionsHDPCDHortonworks
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