230 + Mcqs in Hadoop Page 4 McqOptions

151.	This gathering of data can be?
A.	scheduled
B.	event-driven
C.	user-defined
D.	both a and b
Answer» E.

Discussion

152.	Which of the following is the slowest compression technique?
A.	LZO
B.	Bzip2
C.	Gzip
D.	All of the mentioned
Answer» C. Gzip

Discussion

153.	Which of the following supports splittable compression?
A.	LZO
B.	Bzip2
C.	Gzip
D.	All of the mentioned
Answer» B. Bzip2

Discussion

154.	__________ typically compresses files to within 10% to 15% of the best available techniques.
A.	LZO
B.	Bzip2
C.	Gzip
D.	All of the mentioned
Answer» C. Gzip

Discussion

155.	The LZO compression format is composed of approximately __________ blocks of compressed data.
A.	128k
B.	256k
C.	24k
D.	36k
Answer» C. 24k

Discussion

156.	The ________ method in the ModelCountReducer class “reduces” the values the mapper collects into a derived value.
A.	count
B.	add
C.	reduce
D.	all of the mentioned
Answer» D. all of the mentioned

Discussion

157.	Which of the following is based on the DEFLATE algorithm?
A.	LZO
B.	Bzip2
C.	Gzip
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

158.	Avro schemas describe the format of the message and are defined using ______________
A.	JSON
B.	XML
C.	JS
D.	All of the mentioned
Answer» B. XML

Discussion

159.	Which of the following works well with Avro?
A.	Lucene
B.	kafka
C.	MapReduce
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

160.	Apache _______ is a serialization framework that produces data in a compact binary format.
A.	Oozie
B.	Impala
C.	kafka
D.	Avro
Answer» E.

Discussion

161.	When using reflection to automatically build our schemas without code generation, we need to configure Avro using?
A.	AvroJob.Reflect(jConf);
B.	AvroJob.setReflect(jConf);
C.	Job.setReflect(jConf);
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

162.	With ______ we can store data and read it easily with various programming languages.
A.	Thrift
B.	Protocol Buffers
C.	Avro
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

163.	Which of the following is a primitive data type in Avro?
A.
B.	boolean
C.	float
D.	all of the mentioned
Answer» E.

Discussion

164.	________ are encoded as a series of blocks.
A.	Arrays
B.	Enum
C.	Unions
D.	Maps
Answer» B. Enum

Discussion

165.	The __________ codec uses Google’s Snappy compression library.
A.
B.	snappy
C.	deflate
D.	none of the mentioned
Answer» C. deflate

Discussion

166.	BatchEE projects aims to provide an _________ implementation. (aka JSR352)
A.	JBat
B.	JBatch
C.	JBash
D.	None of the mentioned
Answer» C. JBash

Discussion

167.	_________ allows database-like access, and in particular a SQL interface.
A.	JBatch
B.	Calcite
C.	Blur
D.	All of the mentioned
Answer» C. Blur

Discussion

168.	___________ is a toolkit/application for converting between and editing common office file formats.
A.	Droids
B.	DataFu
C.	Corinthia
D.	Ignite
Answer» D. Ignite

Discussion

169.	Spark runs on top of ___________ a cluster manager system which provides efficient resource isolation across distributed applications.
A.	Mesjs
B.	Mesos
C.	Mesus
D.	All of the mentioned
Answer» C. Mesus

Discussion

170.	Users can easily run Spark on top of Amazon’s __________
A.	Infosphere
B.	EC2
C.	EMR
D.	None of the mentioned
Answer» C. EMR

Discussion

171.	Spark architecture is ___________ times as fast as Hadoop disk-based Apache Mahout and even scales better than Vowpal Wabbit.
A.	10
B.	20
C.	50
D.	100
Answer» B. 20

Discussion

172.	____________ is a distributed machine learning framework on top of Spark.
A.	MLlib
B.	Spark Streaming
C.	GraphX
D.	RDDs
Answer» B. Spark Streaming

Discussion

173.	GraphX provides an API for expressing graph computation that can model the __________ abstraction.
A.	GaAdt
B.	Spark Core
C.	Pregel
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

174.	____________ data file takes is based on avro serialization framework which was primarily created for hadoop.
A.	Oozie
B.	Avro
C.	cTakes
D.	Lucene
Answer» C. cTakes

Discussion

175.	Which of the following compression is similar to Snappy compression?
A.	LZO
B.	Bzip2
C.	Gzip
D.	All of the mentioned
Answer» B. Bzip2

Discussion

176.	How many formats of SequenceFile are present in Hadoop I/O?
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

Discussion

177.	Which of the following format is more compression-aggressive?
A.	Partition Compressed
B.	Record Compressed
C.	Block-Compressed
D.	Uncompressed
Answer» D. Uncompressed

Discussion

178.	Point out the correct statement :
A.	All hadoop commands are invoked by the bin/hadoop script
B.	Hadoop has an option parsing framework that employs only parsing generic options
C.	archive command creates a hadoop archive
D.	All of the mentioned
Answer» B. Hadoop has an option parsing framework that employs only parsing generic options

Discussion

179.	__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.
A.	Microsoft
B.	Cloudera
C.	Amazon
D.	None of the mentioned
Answer» C. Amazon

Discussion

180.	Which of the following is a common reason to restart hadoop process ?
A.	Upgrade Hadoop
B.	React to incidents
C.	Remove worker nodes
D.	All of the mentioned
Answer» E.

Discussion

181.	__________ mode is a Namenode state in which it does not accept changes to the name space.
A.	Recover
B.	Safe
C.	Rollback
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

182.	_________ command is used to copy file or directories recursively.
A.	dtcp
B.	distcp
C.	dcp
D.	distc
Answer» C. dcp

Discussion

183.	Point out the wrong statement :
A.	classNAME displays the class name needed to get the Hadoop jar
B.	Balancer Runs a cluster balancing utility
C.	An administrator can simply press Ctrl-C to stop the rebalancing process
D.	None of the mentioned
Answer» B. Balancer Runs a cluster balancing utility

Discussion

184.	The updated queue configuration should be a valid one i.e. queue-capacity at each level should be equal to :
A.	50%
B.	75%
C.	100%
D.	0%
Answer» D. 0%

Discussion

185.	Apache Hadoop YARN stands for :
A.	Yet Another Reserve Negotiator
B.	Yet Another Resource Network
C.	Yet Another Resource Negotiator
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

186.	Although the Hadoop framework is implemented in Java , MapReduce applications need not be written in :
A.	Java
B.	C
C.	C#
D.	None of the mentioned
Answer» B. C

Discussion

187.	The __________ provides a proxy between the web applications exported by an application and an end user.
A.	ProxyServer
B.	WebAppProxy
C.	WebProxy
D.	None of the mentioned
Answer» C. WebProxy

Discussion

188.	In order to turn on RPC authentication in hadoop, set the value of hadoop.security.authentication property to :
A.	zero
B.	kerberos
C.	false
D.	None of the mentioned
Answer» C. false

Discussion

189.	__________ get events indicating completion (success/failure) of component tasks.
A.	getJobName()
B.	getJobState()
C.	getPriority()
D.	getTaskCompletionEvents(int startFrom)
Answer» E.

Discussion

190.	Which of the following method is used to get user-specified job name ?
A.	getJobName()
B.	getJobState()
C.	getPriority()
D.	All of the mentioned
Answer» B. getJobState()

Discussion

191.	Which of the following is only for storage with limited compute ?
A.	Hot
B.	Cold
C.	Warm
D.	All_SSD
Answer» C. Warm

Discussion

192.	Which of the following storage policy is used for both storage and compute ?
A.	Hot
B.	Cold
C.	Warm
D.	All_SSD
Answer» B. Cold

Discussion

193.	_________ method clears all keys from the configuration.
A.	clear
B.	addResource
C.	getClass
D.	None of the mentioned
Answer» B. addResource

Discussion

194.	______________ 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
Answer» D. SinglethreadedMapRunner

Discussion

195.	An ___________ is responsible for creating the input splits, and dividing them into records.
A.	TextOutputFormat
B.	TextInputFormat
C.	OutputInputFormat
D.	InputFormat
Answer» E.

Discussion

196.	__________ 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
Answer» C. SingleInputs

Discussion

197.	__________ 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
Answer» C. SequenceAsTextInputFormat

Discussion

198.	______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.
A.	KeyFieldPartitioner
B.	KeyFieldBasedPartitioner
C.	KeyFieldBased
D.	None of the mentioned
Answer» C. KeyFieldBased

Discussion

199.	The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
A.	archives
B.	files
C.	task
D.	None of the mentioned
Answer» B. files

Discussion

200.	Which is the most popular NoSQL database for scalable big data store with Hadoop ?
A.	Hbase
B.	MongoDB
C.	Cassandra
D.	None of the mentioned
Answer» B. MongoDB

Discussion

Explore topic-wise MCQs in Technical Programming.

This gathering of data can be?

Which of the following is the slowest compression technique?

Which of the following supports splittable compression?

__________ typically compresses files to within 10% to 15% of the best available techniques.

The LZO compression format is composed of approximately __________ blocks of compressed data.

The ________ method in the ModelCountReducer class “reduces” the values the mapper collects into a derived value.

Which of the following is based on the DEFLATE algorithm?

Avro schemas describe the format of the message and are defined using ______________

Which of the following works well with Avro?

Apache _______ is a serialization framework that produces data in a compact binary format.

When using reflection to automatically build our schemas without code generation, we need to configure Avro using?

With ______ we can store data and read it easily with various programming languages.

Which of the following is a primitive data type in Avro?

________ are encoded as a series of blocks.

The __________ codec uses Google’s Snappy compression library.

BatchEE projects aims to provide an _________ implementation. (aka JSR352)

_________ allows database-like access, and in particular a SQL interface.

___________ is a toolkit/application for converting between and editing common office file formats.

Spark runs on top of ___________ a cluster manager system which provides efficient resource isolation across distributed applications.

Users can easily run Spark on top of Amazon’s __________

Spark architecture is ___________ times as fast as Hadoop disk-based Apache Mahout and even scales better than Vowpal Wabbit.

____________ is a distributed machine learning framework on top of Spark.

GraphX provides an API for expressing graph computation that can model the __________ abstraction.

____________ data file takes is based on avro serialization framework which was primarily created for hadoop.

Which of the following compression is similar to Snappy compression?

How many formats of SequenceFile are present in Hadoop I/O?

Which of the following format is more compression-aggressive?

Point&nbsp;out&nbsp;the&nbsp;correct&nbsp;statement&nbsp;:

__________&nbsp;Manager&rsquo;s&nbsp;Service&nbsp;feature&nbsp;monitors&nbsp;dozens&nbsp;of&nbsp;service&nbsp;health&nbsp;and&nbsp;performance&nbsp;metrics&nbsp;about&nbsp;the&nbsp;services&nbsp;and&nbsp;role&nbsp;instances&nbsp;running&nbsp;on&nbsp;your&nbsp;cluster.

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;common&nbsp;reason&nbsp;to&nbsp;restart&nbsp;hadoop&nbsp;process&nbsp;?

&nbsp;__________&nbsp;mode&nbsp;is&nbsp;a&nbsp;Namenode&nbsp;state&nbsp;in&nbsp;which&nbsp;it&nbsp;does&nbsp;not&nbsp;accept&nbsp;changes&nbsp;to&nbsp;the&nbsp;name&nbsp;space.

_________&nbsp;command&nbsp;is&nbsp;used&nbsp;to&nbsp;copy&nbsp;file&nbsp;or&nbsp;directories&nbsp;recursively.

&nbsp;Point&nbsp;out&nbsp;the&nbsp;wrong&nbsp;statement&nbsp;:

The&nbsp;updated&nbsp;queue&nbsp;configuration&nbsp;should&nbsp;be&nbsp;a&nbsp;valid&nbsp;one&nbsp;i.e.&nbsp;queue-capacity&nbsp;at&nbsp;each&nbsp;level&nbsp;should&nbsp;be&nbsp;equal&nbsp;to&nbsp;:

Apache&nbsp;Hadoop&nbsp;YARN&nbsp;stands&nbsp;for&nbsp;:

Although&nbsp;the&nbsp;Hadoop&nbsp;framework&nbsp;is&nbsp;implemented&nbsp;in&nbsp;Java&nbsp;,&nbsp;MapReduce&nbsp;applications&nbsp;need&nbsp;not&nbsp;be&nbsp;written&nbsp;in&nbsp;:

The&nbsp;__________&nbsp;provides&nbsp;a&nbsp;proxy&nbsp;between&nbsp;the&nbsp;web&nbsp;applications&nbsp;exported&nbsp;by&nbsp;an&nbsp;application&nbsp;and&nbsp;an&nbsp;end&nbsp;user.

In&nbsp;order&nbsp;to&nbsp;turn&nbsp;on&nbsp;RPC&nbsp;authentication&nbsp;in&nbsp;hadoop,&nbsp;set&nbsp;the&nbsp;value&nbsp;of&nbsp;hadoop.security.authentication&nbsp;property&nbsp;to&nbsp;:

__________&nbsp;get&nbsp;events&nbsp;indicating&nbsp;completion&nbsp;(success/failure)&nbsp;of&nbsp;component&nbsp;tasks.

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;method&nbsp;is&nbsp;used&nbsp;to&nbsp;get&nbsp;user-specified&nbsp;job&nbsp;name&nbsp;?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;only&nbsp;for&nbsp;storage&nbsp;with&nbsp;limited&nbsp;compute&nbsp;?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;storage&nbsp;policy&nbsp;is&nbsp;used&nbsp;for&nbsp;both&nbsp;storage&nbsp;and&nbsp;compute&nbsp;?

_________&nbsp;method&nbsp;clears&nbsp;all&nbsp;keys&nbsp;from&nbsp;the&nbsp;configuration.

&nbsp;______________&nbsp;is&nbsp;another&nbsp;implementation&nbsp;of&nbsp;the&nbsp;MapRunnable&nbsp;interface&nbsp;that&nbsp;runs&nbsp;mappers&nbsp;concurrently&nbsp;in&nbsp;a&nbsp;configurable&nbsp;number&nbsp;of&nbsp;threads.

An&nbsp;___________&nbsp;is&nbsp;responsible&nbsp;for&nbsp;creating&nbsp;the&nbsp;input&nbsp;splits,&nbsp;and&nbsp;dividing&nbsp;them&nbsp;into&nbsp;records.

&nbsp;__________&nbsp;class&nbsp;allows&nbsp;you&nbsp;to&nbsp;specify&nbsp;the&nbsp;InputFormat&nbsp;and&nbsp;Mapper&nbsp;to&nbsp;use&nbsp;on&nbsp;a&nbsp;per-path&nbsp;basis.

__________&nbsp;is&nbsp;a&nbsp;variant&nbsp;of&nbsp;SequenceFileInputFormat&nbsp;that&nbsp;converts&nbsp;the&nbsp;sequence&nbsp;file&rsquo;s&nbsp;keys&nbsp;and&nbsp;values&nbsp;to&nbsp;Text&nbsp;objects

______________&nbsp;class&nbsp;allows&nbsp;the&nbsp;Map/Reduce&nbsp;framework&nbsp;to&nbsp;partition&nbsp;the&nbsp;map&nbsp;outputs&nbsp;based&nbsp;on&nbsp;certain&nbsp;key&nbsp;fields,&nbsp;not&nbsp;the&nbsp;whole&nbsp;keys.

The&nbsp;________&nbsp;option&nbsp;allows&nbsp;you&nbsp;to&nbsp;copy&nbsp;jars&nbsp;locally&nbsp;to&nbsp;the&nbsp;current&nbsp;working&nbsp;directory&nbsp;of&nbsp;tasks&nbsp;and&nbsp;automatically&nbsp;unjar&nbsp;the&nbsp;files.

Which&nbsp;is&nbsp;the&nbsp;most&nbsp;popular&nbsp;NoSQL&nbsp;database&nbsp;for&nbsp;scalable&nbsp;big&nbsp;data&nbsp;store&nbsp;with&nbsp;Hadoop&nbsp;?

Point out the correct statement :

__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.

Which of the following is a common reason to restart hadoop process ?

__________ mode is a Namenode state in which it does not accept changes to the name space.

_________ command is used to copy file or directories recursively.

Point out the wrong statement :

The updated queue configuration should be a valid one i.e. queue-capacity at each level should be equal to :

Apache Hadoop YARN stands for :

Although the Hadoop framework is implemented in Java , MapReduce applications need not be written in :

The __________ provides a proxy between the web applications exported by an application and an end user.

In order to turn on RPC authentication in hadoop, set the value of hadoop.security.authentication property to :

__________ get events indicating completion (success/failure) of component tasks.

Which of the following method is used to get user-specified job name ?

Which of the following is only for storage with limited compute ?

Which of the following storage policy is used for both storage and compute ?

_________ method clears all keys from the configuration.

______________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.

An ___________ is responsible for creating the input splits, and dividing them into records.

__________ class allows you to specify the InputFormat and Mapper to use on a per-path basis.

__________ is a variant of SequenceFileInputFormat that converts the sequence file’s keys and values to Text objects

______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.

The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.

Which is the most popular NoSQL database for scalable big data store with Hadoop ?