230 + Mcqs in Hadoop Page 5 McqOptions

201.	HDFS and NoSQL file systems focus almost exclusively on adding nodes to :
A.	Scale out
B.	Scale up
C.	Both Scale out and up
D.	None of the mentioned
Answer» B. Scale up

Discussion

202.	Which of the following phases occur simultaneously ?
A.	Shuffle and Sort
B.	Reduce and Sort
C.	Shuffle and Map
D.	All of the mentioned
Answer» B. Reduce and Sort

Discussion

203.	The output of the _______ is not sorted in the Mapreduce framework for Hadoop.
A.	Mapper
B.	Cascader
C.	Scalding
D.	None of the mentioned
Answer» E.

Discussion

204.	The ________ class provides the getValue() method to read the values from its instance.
A.	Get
B.	Result
C.	Put
D.	Value
Answer» C. Put

Discussion

205.	__________ class adds HBase configuration files to its object.
A.	Configuration
B.	Collector
C.	Component
D.	None of the mentioned
Answer» B. Collector

Discussion

206.	The standard output (stdout) and error (stderr) streams of the task are read by the TaskTracker and logged to :
A.	${HADOOP_LOG_DIR}/user
B.	${HADOOP_LOG_DIR}/userlogs
C.	${HADOOP_LOG_DIR}/logs
D.	None of the mentioned
Answer» C. ${HADOOP_LOG_DIR}/logs

Discussion

207.	During the execution of a streaming job, the names of the _______ parameters are transformed.
A.	vmap
B.	mapvim
C.	mapreduce
D.	mapred
Answer» E.

Discussion

208.	The ___________ executes the Mapper/ Reducer task as a child process in a separate jvm.
A.	JobTracker
B.	TaskTracker
C.	TaskScheduler
D.	None of the mentioned
Answer» B. TaskTracker

Discussion

209.	__________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.
A.	JobConfig
B.	JobConf
C.	JobConfiguration
D.	All of the mentioned
Answer» C. JobConfiguration

Discussion

210.	The right level of parallelism for maps seems to be around _________ maps per-node
A.	1-10
B.	10-100
C.	100-150
D.	150-200
Answer» C. 100-150

Discussion

211.	Applications can use the ____________ to report progress and set application-level status messages
A.	Partitioner
B.	OutputSplit
C.	Reporter
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

212.	Reducer is input the grouped output of a :
A.	Mapper
B.	Reducer
C.	Writable
D.	Readable
Answer» B. Reducer

Discussion

213.	Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.
A.	Mapper
B.	Reducer
C.	Writable
D.	Readable
Answer» C. Writable

Discussion

214.	________ is the slave/worker node and holds the user data in the form of Data Blocks.
A.	DataNode
B.	NameNode
C.	Data block
D.	Replication
Answer» B. NameNode

Discussion

215.	The need for data replication can arise in various scenarios like :
A.	Replication Factor is changed
B.	DataNode goes down
C.	Data Blocks get corrupted
D.	All of the mentioned
Answer» E.

Discussion

216.	Which of the following scenario may not be a good fit for HDFS ?
A.	HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file
B.	HDFS is suitable for storing data related to applications requiring low latency data access
C.	HDFS is suitable for storing data related to applications requiring low latency data access
D.	None of the mentioned
Answer» B. HDFS is suitable for storing data related to applications requiring low latency data access

Discussion

217.	_________ identifies filesystem pathnames which work as usual with regular expressions.
A.	archiveName
B.	source
C.	destination
D.	None of the mentioned
Answer» E.

Discussion

218.	Which of the following parameter describes destination directory which would contain the archive ?
A.	archiveName
B.	source
C.	destination
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

219.	_________ is a pluggable Map/Reduce scheduler for Hadoop which provides a way to share large clusters.
A.	Flow Scheduler
B.	Data Scheduler
C.	Capacity Scheduler
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

220.	On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.
A.	InputReader
B.	RecordReader
C.	OutputReader
D.	None of the mentioned
Answer» C. OutputReader

Discussion

221.	InputFormat class calls the ________ function and computes splits for each file and then sends them to the jobtracker.
A.	puts
B.	gets
C.	getSplits
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

222.	Hadoop achieves reliability by replicating the data across multiple hosts, and hence does not require ________ storage on hosts.
A.	RAID
B.	Standard RAID levels
C.	ZFS
D.	Operating system
Answer» B. Standard RAID levels

Discussion

223.	Which of the following platforms does Hadoop run on ?
A.	Bare metal
B.	Debian
C.	Cross-platform
D.	Unix-like
Answer» D. Unix-like

Discussion

224.	What was Hadoop written in ?
A.	Java (software platform)
B.	Perl
C.	Java (programming language)
D.	Lua (programming language)
Answer» D. Lua (programming language)

Discussion

225.	Which of the following genres does Hadoop produce ?
A.	Distributed file system
B.	JAX-RS
C.	Java Message Service
D.	Relational Database Management System
Answer» B. JAX-RS

Discussion

226.	___________ is general-purpose computing model and runtime system for distributed data analytics.
A.	Mapreduce
B.	Drill
C.	Oozie
D.	None of the mentioned
Answer» B. Drill

Discussion

227.	________ is the most popular high-level Java API in Hadoop Ecosystem
A.	Scalding
B.	HCatalog
C.	Cascalog
D.	Cascading
Answer» E.

Discussion

228.	All of the following accurately describe Hadoop, EXCEPT:
A.	Open source
B.	Real-time
C.	Java-based
D.	Distributed computing approach
Answer» C. Java-based

Discussion

229.	What was Hadoop named after?
A.	Creator Doug Cutting’s favorite circus act
B.	Cutting’s high school rock band
C.	The toy elephant of Cutting’s son
D.	A sound Cutting’s laptop made during Hadoop’s development
Answer» D. A sound Cutting’s laptop made during Hadoop’s development

Discussion

230.	Point out the wrong statement :
A.	Hardtop’s processing capabilities are huge and its real advantage lies in the ability to process terabytes & petabytes of data
B.	Hadoop uses a programming model called “MapReduce”, all the programs should confirms to this model in order to work on Hadoop platform
C.	The programming model, MapReduce, used by Hadoop is difficult to write and test
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

Explore topic-wise MCQs in Technical Programming.

&nbsp;HDFS&nbsp;and&nbsp;NoSQL&nbsp;file&nbsp;systems&nbsp;focus&nbsp;almost&nbsp;exclusively&nbsp;on&nbsp;adding&nbsp;nodes&nbsp;to&nbsp;:

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;phases&nbsp;occur&nbsp;simultaneously&nbsp;?

The&nbsp;output&nbsp;of&nbsp;the&nbsp;_______&nbsp;is&nbsp;not&nbsp;sorted&nbsp;in&nbsp;the&nbsp;Mapreduce&nbsp;framework&nbsp;for&nbsp;Hadoop.

The&nbsp;________&nbsp;class&nbsp;provides&nbsp;the&nbsp;getValue()&nbsp;method&nbsp;to&nbsp;read&nbsp;the&nbsp;values&nbsp;from&nbsp;its&nbsp;instance.

__________&nbsp;class&nbsp;adds&nbsp;HBase&nbsp;configuration&nbsp;files&nbsp;to&nbsp;its&nbsp;object.

The&nbsp;standard&nbsp;output&nbsp;(stdout)&nbsp;and&nbsp;error&nbsp;(stderr)&nbsp;streams&nbsp;of&nbsp;the&nbsp;task&nbsp;are&nbsp;read&nbsp;by&nbsp;the&nbsp;TaskTracker&nbsp;and&nbsp;logged&nbsp;to&nbsp;:

During&nbsp;the&nbsp;execution&nbsp;of&nbsp;a&nbsp;streaming&nbsp;job,&nbsp;the&nbsp;names&nbsp;of&nbsp;the&nbsp;_______&nbsp;parameters&nbsp;are&nbsp;transformed.

The&nbsp;___________&nbsp;executes&nbsp;the&nbsp;Mapper/&nbsp;Reducer&nbsp;task&nbsp;as&nbsp;a&nbsp;child&nbsp;process&nbsp;in&nbsp;a&nbsp;separate&nbsp;jvm.

__________&nbsp;is&nbsp;the&nbsp;primary&nbsp;interface&nbsp;for&nbsp;a&nbsp;user&nbsp;to&nbsp;describe&nbsp;a&nbsp;MapReduce&nbsp;job&nbsp;to&nbsp;the&nbsp;Hadoop&nbsp;framework&nbsp;for&nbsp;execution.

The&nbsp;right&nbsp;level&nbsp;of&nbsp;parallelism&nbsp;for&nbsp;maps&nbsp;seems&nbsp;to&nbsp;be&nbsp;around&nbsp;_________&nbsp;maps&nbsp;per-node

Applications&nbsp;can&nbsp;use&nbsp;the&nbsp;____________&nbsp;to&nbsp;report&nbsp;progress&nbsp;and&nbsp;set&nbsp;application-level&nbsp;status&nbsp;messages

Reducer&nbsp;is&nbsp;input&nbsp;the&nbsp;grouped&nbsp;output&nbsp;of&nbsp;a&nbsp;:

Interface&nbsp;____________&nbsp;reduces&nbsp;a&nbsp;set&nbsp;of&nbsp;intermediate&nbsp;values&nbsp;which&nbsp;share&nbsp;a&nbsp;key&nbsp;to&nbsp;a&nbsp;smaller&nbsp;set&nbsp;of&nbsp;values.

________&nbsp;is&nbsp;the&nbsp;slave/worker&nbsp;node&nbsp;and&nbsp;holds&nbsp;the&nbsp;user&nbsp;data&nbsp;in&nbsp;the&nbsp;form&nbsp;of&nbsp;Data&nbsp;Blocks.

The&nbsp;need&nbsp;for&nbsp;data&nbsp;replication&nbsp;can&nbsp;arise&nbsp;in&nbsp;various&nbsp;scenarios&nbsp;like&nbsp;:

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;scenario&nbsp;may&nbsp;not&nbsp;be&nbsp;a&nbsp;good&nbsp;fit&nbsp;for&nbsp;HDFS&nbsp;?

_________&nbsp;identifies&nbsp;filesystem&nbsp;pathnames&nbsp;which&nbsp;work&nbsp;as&nbsp;usual&nbsp;with&nbsp;regular&nbsp;expressions.

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;parameter&nbsp;describes&nbsp;destination&nbsp;directory&nbsp;which&nbsp;would&nbsp;contain&nbsp;the&nbsp;archive&nbsp;?

&nbsp;_________&nbsp;is&nbsp;a&nbsp;pluggable&nbsp;Map/Reduce&nbsp;scheduler&nbsp;for&nbsp;Hadoop&nbsp;which&nbsp;provides&nbsp;a&nbsp;way&nbsp;to&nbsp;share&nbsp;large&nbsp;clusters.

On&nbsp;a&nbsp;tasktracker,&nbsp;the&nbsp;map&nbsp;task&nbsp;passes&nbsp;the&nbsp;split&nbsp;to&nbsp;the&nbsp;createRecordReader()&nbsp;method&nbsp;on&nbsp;InputFormat&nbsp;to&nbsp;obtain&nbsp;a&nbsp;_________&nbsp;for&nbsp;that&nbsp;split.

InputFormat&nbsp;class&nbsp;calls&nbsp;the&nbsp;________&nbsp;function&nbsp;and&nbsp;computes&nbsp;splits&nbsp;for&nbsp;each&nbsp;file&nbsp;and&nbsp;then&nbsp;sends&nbsp;them&nbsp;to&nbsp;the&nbsp;jobtracker.

Hadoop&nbsp;achieves&nbsp;reliability&nbsp;by&nbsp;replicating&nbsp;the&nbsp;data&nbsp;across&nbsp;multiple&nbsp;hosts,&nbsp;and&nbsp;hence&nbsp;does&nbsp;not&nbsp;require&nbsp;________&nbsp;storage&nbsp;on&nbsp;hosts.

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;platforms&nbsp;does&nbsp;Hadoop&nbsp;run&nbsp;on&nbsp;?

What&nbsp;was&nbsp;Hadoop&nbsp;written&nbsp;in&nbsp;?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;genres&nbsp;does&nbsp;Hadoop&nbsp;produce&nbsp;?

___________&nbsp;is&nbsp;general-purpose&nbsp;computing&nbsp;model&nbsp;and&nbsp;runtime&nbsp;system&nbsp;for&nbsp;distributed&nbsp;data&nbsp;analytics.

________&nbsp;is&nbsp;the&nbsp;most&nbsp;popular&nbsp;high-level&nbsp;Java&nbsp;API&nbsp;in&nbsp;Hadoop&nbsp;Ecosystem

&nbsp;All&nbsp;of&nbsp;the&nbsp;following&nbsp;accurately&nbsp;describe&nbsp;Hadoop,&nbsp;EXCEPT:

What&nbsp;was&nbsp;Hadoop&nbsp;named&nbsp;after?

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

HDFS and NoSQL file systems focus almost exclusively on adding nodes to :

Which of the following phases occur simultaneously ?

The output of the _______ is not sorted in the Mapreduce framework for Hadoop.

The ________ class provides the getValue() method to read the values from its instance.

__________ class adds HBase configuration files to its object.

The standard output (stdout) and error (stderr) streams of the task are read by the TaskTracker and logged to :

During the execution of a streaming job, the names of the _______ parameters are transformed.

The ___________ executes the Mapper/ Reducer task as a child process in a separate jvm.

__________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.

The right level of parallelism for maps seems to be around _________ maps per-node

Applications can use the ____________ to report progress and set application-level status messages

Reducer is input the grouped output of a :

Interface ____________ reduces a set of intermediate values which share a key to a smaller set of values.

________ is the slave/worker node and holds the user data in the form of Data Blocks.

The need for data replication can arise in various scenarios like :

Which of the following scenario may not be a good fit for HDFS ?

_________ identifies filesystem pathnames which work as usual with regular expressions.

Which of the following parameter describes destination directory which would contain the archive ?

_________ is a pluggable Map/Reduce scheduler for Hadoop which provides a way to share large clusters.

On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.

InputFormat class calls the ________ function and computes splits for each file and then sends them to the jobtracker.

Hadoop achieves reliability by replicating the data across multiple hosts, and hence does not require ________ storage on hosts.

Which of the following platforms does Hadoop run on ?

What was Hadoop written in ?

Which of the following genres does Hadoop produce ?

___________ is general-purpose computing model and runtime system for distributed data analytics.

________ is the most popular high-level Java API in Hadoop Ecosystem

All of the following accurately describe Hadoop, EXCEPT:

What was Hadoop named after?

Point out the wrong statement :