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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 5 of 8

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Q41.
Which of the following method add a path or paths to the list of inputs?

a.

setInputPaths()

b.

addInputPath()

c.

setInput()

d.

none of the mentioned

Discuss
Answer: (b).addInputPath()
Q42.
___________ takes node and rack locality into account when deciding which blocks to place in the same split.

a.

CombineFileOutputFormat

b.

CombineFileInputFormat

c.

TextFileInputFormat

d.

None of the mentioned

Discuss
Answer: (b).CombineFileInputFormat
Q43.
The key, a ____________ is the byte offset within the file of the beginning of the line.

a.

LongReadable

b.

LongWritable

c.

LongWritable

d.

All of the mentioned

Discuss
Answer: (c).LongWritable
Q44.
_________ is the output produced by TextOutputFor mat, Hadoop default OutputFormat.

a.

KeyValueTextInputFormat

b.

KeyValueTextOutputFormat

c.

FileValueTextInputFormat

d.

All of the mentioned

Discuss
Answer: (b).KeyValueTextOutputFormat
Q45.
__________ is a variant of SequenceFileInputFormat that converts the sequence file’s keys and values to Text objects.

a.

SequenceFile

b.

SequenceFileAsTextInputFormat

c.

SequenceAsTextInputFormat

d.

All of the mentioned

Discuss
Answer: (b).SequenceFileAsTextInputFormat
Q46.
__________ class allows you to specify the InputFormat and Mapper to use on a per-path basis.

a.

MultipleOutputs

b.

MultipleInputs

c.

SingleInputs

d.

None of the mentioned

Discuss
Answer: (b).MultipleInputs
Q47.
___________ is an input format for reading data from a relational database, using JDBC.

a.

DBInput

b.

DBInputFormat

c.

DBInpFormat

d.

All of the mentioned

Discuss
Answer: (b).DBInputFormat
Q48.
Which of the following is the default output format?

a.

TextFormat

b.

TextOutput

c.

TextOutputFormat

d.

None of the mentioned

Discuss
Answer: (c).TextOutputFormat
Q49.
Which of the following writes MapFiles as output?

a.

DBInpFormat

b.

MapFileOutputFormat

c.

SequenceFileAsBinaryOutputFormat

d.

None of the mentioned

Discuss
Answer: (c).SequenceFileAsBinaryOutputFormat
Q50.
The split size is normally the size of a ________ block, which is appropriate for most applications.

a.

Generic

b.

Task

c.

Library

d.

HDFS

Discuss
Answer: (d).HDFS
Page 5 of 8

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