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Welcome to the MapReduce Basics MCQs Page

Dive deep into the fascinating world of MapReduce Basics with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of MapReduce Basics, a crucial aspect of Hadoop. In this section, you will encounter a diverse range of MCQs that cover various aspects of MapReduce Basics, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Hadoop.

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Check out the MCQs below to embark on an enriching journey through MapReduce Basics. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Hadoop.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of MapReduce Basics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

MapReduce Basics MCQs | Page 4 of 8

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Q31.
Which of the following class provides a subset of features provided by the Unix/GNU Sort?

a.

KeyFieldBased

b.

KeyFieldComparator

c.

KeyFieldBasedComparator

d.

All of the mentioned

Discuss
Answer: (c).KeyFieldBasedComparator
Q32.
Which of the following class is provided by the Aggregate package?

a.

Map

b.

Reducer

c.

Reduce

d.

None of the mentioned

Discuss
Answer: (b).Reducer
Q33.
Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.

a.

Copy

b.

Cut

c.

Paste

d.

Move

Discuss
Answer: (b).Cut
Q34.
___________ generates keys of type LongWritable and values of type Text.

a.

TextOutputFormat

b.

TextInputFormat

c.

OutputInputFormat

d.

None of the mentioned

Discuss
Answer: (b).TextInputFormat
Q35.
In _____________ the default job is similar, but not identical, to the Java equivalent.

a.

Mapreduce

b.

Streaming

c.

Orchestration

d.

All of the mentioned

Discuss
Answer: (b).Streaming
Q36.
An input _________ is a chunk of the input that is processed by a single map.

a.

textformat

b.

split

c.

datanode

d.

all of the mentioned

Discuss
Answer: (b).split
Q37.
An ___________ is responsible for creating the input splits, and dividing them into records.

a.

TextOutputFormat

b.

TextInputFormat

c.

OutputInputFormat

d.

InputFormat

Discuss
Answer: (d).InputFormat
Q38.
______________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.

a.

MultithreadedRunner

b.

MultithreadedMap

c.

MultithreadedMapRunner

d.

SinglethreadedMapRunner

Discuss
Answer: (c).MultithreadedMapRunner
Q39.
Which of the following is the only way of running mappers?

a.

MapReducer

b.

MapRunner

c.

MapRed

d.

All of the mentioned

Discuss
Answer: (b).MapRunner
Q40.
_________ is the base class for all implementations of InputFormat that use files as their data source.

a.

FileTextFormat

b.

FileInputFormat

c.

FileOutputFormat

d.

None of the mentioned

Discuss
Answer: (b).FileInputFormat
Page 4 of 8

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