a) KeyFieldBasedb) KeyFieldComparatorc) KeyFieldBasedComparatord) All of the mentioned Answer: cExplanation: Hadoop has a library class, ...
View Question______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.
a) KeyFieldPartitionerb) KeyFieldBasedPartitionerc) KeyFieldBasedd) None of the mentioned Answer: bExplanation: The primary key is used ...
View QuestionThe ________ option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.
a) archivesb) filesc) taskd) none of the mentioned Answer: aExplanation: Archives options is also a ...
View QuestionPoint out the wrong statement.
a) Hadoop has a library package called Aggregateb) Aggregate allows you to define a mapper plugin class that ...
View QuestionTo set an environment variable in a streaming command use ____________
a) -cmden EXAMPLE_DIR=/home/example/dictionaries/b) -cmdev EXAMPLE_DIR=/home/example/dictionaries/c) -cmdenv EXAMPLE_DIR=/home/example/dictionaries/d) -cmenv EXAMPLE_DIR=/home/example/dictionaries/ Answer: cExplanation: Environment Variable is set ...
View QuestionWhich of the following Hadoop streaming command option parameter is required?
a) output directorynameb) mapper executablec) input directorynamed) all of the mentioned Answer: dExplanation: Required parameters ...
View QuestionPoint out the correct statement.
a) You can specify any executable as the mapper and/or the reducerb) You cannot supply a Java class ...
View QuestionStreaming supports streaming command options as well as _________ command options.
a) genericb) toolc) libraryd) task Answer: aExplanation: Place the generic options before the streaming options, ...
View Question_________ is the default Partitioner for partitioning key space.
a) HashParb) Partitionerc) HashPartitionerd) None of the mentioned Answer: cExplanation: The default partitioner in Hadoop ...
View QuestionThe number of maps is usually driven by the total size of ____________
a) inputsb) outputsc) tasksd) None of the mentioned Answer: aExplanation: Total size of inputs means ...
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