Hortonworks HDPCD Test, Hortonworks Exam Dumps - Passing Hortonworks HDPCD Test can not only chang your work and life can bring, People around the world prefer HDPCD Test certification to make their careers more strengthened and successful, then do not miss HDPCD Test website, HDPCD Test We can provide the questions based on extensive research and experience, so that you can check the reliability HDPCD Test of our product, Are you still hesitant? HDPCD Test Do not hesitate, Hortonworks HDPCD Test is the most thorough, HDPCD Test In order to stabilize your job position, you can 100% pass HDPCD Test the exam, it goes without saying that our HDPCD Test quality is certainly the best, it is time to HDPCD Test make a choice, then you will come to the road to success HDPCD Test
NO.1 You write MapReduce job to process 100 files in HDFS. Your MapReduce algorithm uses
TextInputFormat: the mapper applies a regular expression over input values and emits key-values
pairs with the key consisting of the matching text, and the value containing the filename and byte
offset. Determine the difference between setting the number of reduces to one and settings the
number of reducers to zero.
A. There is no difference in output between the two settings.
B. With zero reducers, all instances of matching patterns are gathered together in one file on HDFS.
With one reducer, instances of matching patterns are stored in multiple files on HDFS.
C. With zero reducers, instances of matching patterns are stored in multiple files on HDFS. With one
reducer, all instances of matching patterns are gathered together in one file on HDFS.
D. With zero reducers, no reducer runs and the job throws an exception. With one reducer, instances
of matching patterns are stored in a single file on HDFS.
Answer: C
HDPCD braindump
Explanation:
* It is legal to set the number of reduce-tasks to zero if no reduction is desired.
In this case the outputs of the map-tasks go directly to the FileSystem, into the output path set by
setOutputPath(Path). The framework does not sort the map-outputs before writing them out to the
FileSystem.
* Often, you may want to process input data using a map function only. To do this, simply set
mapreduce.job.reduces to zero. The MapReduce framework will not create any reducer tasks.
Rather, the outputs of the mapper tasks will be the final output of the job.
Note:
Reduce
In this phase the reduce(WritableComparable, Iterator, OutputCollector, Reporter) method
is called for each <key, (list of values)> pair in the grouped inputs.
The output of the reduce task is typically written to the FileSystem via
OutputCollector.collect(WritableComparable, Writable).
Applications can use the Reporter to report progress, set application-level status messages
and update Counters, or just indicate that they are alive.
The output of the Reducer is not sorted.
NO.2 Which one of the following statements describes the relationship between the NodeManager
and the ApplicationMaster?
A. The NodeManager creates an instance of the ApplicationMaster
B. The ApplicationMaster starts the NodeManager outside of a Container
C. The NodeManager requests resources from the ApplicationMaster
D. The ApplicationMaster starts the NodeManager in a Container
Answer: A
HDPCD Exam PDF
Our GetCertKey provides HDPCD Free Demo and training materials in PDF and software, which contains HDPCD Free Demo and answers. Moreover, the content of HDPCD Free Demo and training materials covers largely and more reliably, and it will help you most to prepare HDPCD Free Demo. If you fail the HDPCD Free Demo with our HDPCD Free Demo, please don't worry. We will refund fully.
Exam Code: HDPCDExam Name: Hortonworks Data Platform Certified Developer
One year free update, No help, Full refund!
HDPCD Free Demo Total Q&A: 110 Questions and Answers
Last Update: 2016-09-27
HDPCD Exam Questions Detail: HDPCD Free Demo
You can free download part of GetCertKey's exercises and answers about Hortonworks certification HDPCD Free Demo as a try, then you will be more confident to choose our GetCertKey's products to prepare your Hortonworks certification HDPCD Free Demo. Please add GetCertKey's products in you cart quickly.
HDPCD Free Demo Download: http://www.getcertkey.com/HDPCD_braindumps.html