In Hadoop ______ go to the Hadoop distribution directory for HDInsight.
Command Line
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Shell
Compaction
None of the Option is Correct
Category: Big Data Technology
Hadoop _____ is a utility to support running external map and reduce jobs.
Hadoop _____ is a utility to support running external map and reduce jobs.
Streaming
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Orchestration
Collection
All Options are Correct
Point out the Correct Statement.
Point out the Correct Statement.
All Options are Correct
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Hadoop has been demonstrated on GNU/Linux clusters with 2000 nodes.
GNU/Linux is supported as a development and production platform
Distributed operation has not been well tested on Win32, so it is not supported as a production platform
Microsoft and Hortonworks joined their forces to make Hadoop available on __ for on-premise deployments.
“
Microsoft and Hortonworks joined their forces to make Hadoop available on ______ for on-premise deployments.
Windows Server
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Windows 7
Windows 8
Ubundu
Which of the following class is provided by the Aggregate package?
Which of the following class is provided by the Aggregate package?
Reducer
Well Done. Your Answer is Correct Keep it Up! Explanation: Aggregate provides a special reducer class and a special combiner class, and a list of simple aggregators that perform aggregations such as “sum”, “max”, “min” and so on over a sequence of values.
Reduce
Map
None of the Option is Correct
Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.
Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.
Cut
Well Done. Your Answer is Correct Keep it Up! Explanation: The map function defined in the class treats each input key/value pair as a list of fields.
Copy
Paste
Move
Which of the following class provides a subset of features provided by the Unix/GNU Sort?
Which of the following class provides a subset of features provided by the Unix/GNU Sort?
KeyFieldBasedComparator
Well Done. Your Answer is Correct Keep it Up! Explanation: Hadoop has a library class, KeyFieldBasedComparator, that is useful for many applications.
KeyFieldComparator
KeyFieldBased
All Options are Correct
______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.
______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.
KeyFieldBasedPartitioner
Well Done. Your Answer is Correct Keep it Up! Explanation: The primary key is used for partitioning, and the combination of the primary and secondary keys is used for sorting.
KeyFieldPartitioner
KeyFieldBased
None of the Option is Correct
The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
The ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
archives
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files
task
All Options are Correct
Point out the wrong statement.
Point out the wrong statement.
To use Aggregate, simply specify “-mapper aggregate”
Excellent ! Your Answer is Correct. Explanation: To use Aggregate, simply specify “-reducer aggregate”:
None of the Options is Correct
Aggregate allows you to define a mapper plugin class that is expected to generate “aggregatable items” for each input key/value pair of the mappers
Hadoop has a library package called Aggregate