CCD-410 Exam Dumps | Which best describes how TextInputFormat processes input files and line breaks?

Home
Cloudera
Cloudera Certified Developer for Apache Hadoop (CCDH)
Cloudera.CCD-410.v2018-10-11.q35
Question 21

Valid CCD-410 Dumps shared by ExamDiscuss.com for Helping Passing CCD-410 Exam! ExamDiscuss.com now offer the newest CCD-410 exam dumps, the ExamDiscuss.com CCD-410 exam questions have been updated and answers have been corrected get the newest ExamDiscuss.com CCD-410 dumps with Test Engine here:

Access CCD-410 Dumps Premium Version
(60 Q&As Dumps, 35%OFF Special Discount Code: freecram)

<< Prev Question Next Question >>

Question 21/35

Which best describes how TextInputFormat processes input files and line breaks?

A. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.

B. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.

C. The input file is split exactly at the line breaks, so each RecordReader will read a series of complete lines.

D. Input file splits may cross line breaks. A line that crosses file splits is ignored.

E. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.

Correct Answer: E

Explanation/Reference:
As the Map operation is parallelized the input file set is first split to several pieces called FileSplits. If an individual file is so large that it will affect seek time it will be split to several Splits. The splitting does not know anything about the input file's internal logical structure, for example line-oriented text files are split on arbitrary byte boundaries. Then a new map task is created per FileSplit.
When an individual map task starts it will open a new output writer per configured reduce task. It will then proceed to read its FileSplit using the RecordReader it gets from the specified InputFormat. InputFormat parses the input and generates key-value pairs. InputFormat must also handle records that may be split on the FileSplit boundary. For example TextInputFormat will read the last line of the FileSplit past the split boundary and, when reading other than the first FileSplit, TextInputFormat ignores the content up to the first newline.
Reference: How Map and Reduce operations are actually carried out

Your email address will not be published. Required fields are marked *

Comment: *

Name: *

Email: *

Rating: *

Verification: *

Question List (35q): Question 1: You have written a Mapper which invokes the following five c...; Question 2: For each intermediate key, each reducer task can emit:...; Question 3: The Hadoop framework provides a mechanism for coping with ma...; Question 4: You write MapReduce job to process 100 files in HDFS. Your M...; Question 5: Which process describes the lifecycle of a Mapper?...; Question 6: You have the following key-value pairs as output from your M...; Question 7: You need to create a job that does frequency analysis on inp...; Question 8: What types of algorithms are difficult to express in MapRedu...; Question 9: In a MapReduce job with 500 map tasks, how many map task att...; Question 10: In a MapReduce job, the reducer receives all values associat...; Question 11: In a MapReduce job, you want each of your input files proces...; Question 12: Indentify which best defines a SequenceFile?...; Question 13: MapReduce v2 (MRv2/YARN) splits which major functions of the...; Question 14: Workflows expressed in Oozie can contain:...; Question 15: When can a reduce class also serve as a combiner without aff...; Question 16: For each input key-value pair, mappers can emit:...; Question 17: Table metadata in Hive is:; Question 18: A client application creates an HDFS file named foo.txt with...; Question 19: A combiner reduces:; Question 20: You have user profile records in your OLPT database, that yo...; Question 21: Which best describes how TextInputFormat processes input fil...; Question 22: What is the disadvantage of using multiple reducers with the...; Question 23: Given a directory of files with the following structure: lin...; Question 24: In a large MapReduce job with m mappers and n reducers, how ...; Question 25: On a cluster running MapReduce v1 (MRv1), a TaskTracker hear...; Question 26: In the reducer, the MapReduce API provides you with an itera...; Question 27: What data does a Reducer reduce method process?...; Question 28: Identify the MapReduce v2 (MRv2 / YARN) daemon responsible f...; Question 29: All keys used for intermediate output from mappers must:...; Question 30: To process input key-value pairs, your mapper needs to lead ...; Question 31: You need to perform statistical analysis in your MapReduce j...; Question 32: Analyze each scenario below and indentify which best describ...; Question 33: Determine which best describes when the reduce method is fir...; Question 34: You need to move a file titled "weblogs" into HDFS. When you...; Question 35: Which best describes what the map method accepts and emits?...

[×]

Download PDF File

Enter your email address to download Cloudera.CCD-410.v2018-10-11.q35.pdf

Email:

Disclaimer:
Freecram doesn't offer Real GIAC Exam Questions. Freecram doesn't offer Real SAP Exam Questions. Freecram doesn't offer Real (ISC)² Exam Questions. Freecram doesn't offer Real CompTIA Exam Questions. Freecram doesn't offer Real Microsoft Exam Questions.
Oracle and Java are registered trademarks of Oracle and/or its affiliates.
Freecram material do not contain actual actual Oracle Exam Questions or material.
Microsoft®, Azure®, Windows®, Windows Vista®, and the Windows logo are registered trademarks of Microsoft Corporation.
Freecram Materials do not contain actual questions and answers from Cisco's Certification Exams. The brand Cisco is a registered trademark of CISCO, Inc.
CFA Institute does not endorse, promote or warrant the accuracy or quality of these questions. CFA® and Chartered Financial Analyst® are registered trademarks owned by CFA Institute.
Freecram does not offer exam dumps or questions from actual exams. We offer learning material and practice tests created by subject matter experts to assist and help learners prepare for those exams. All certification brands used on the website are owned by the respective brand owners. Freecram does not own or claim any ownership on any of the brands.

Question 21/35

LEAVE A REPLY

Download PDF File