a) Hadoop works better with a small number of large files than a large number of small files
View QuestionPoint out the correct statement.
a) The minimum split size is usually 1 byte, although some formats have a lower bound on the ...
View QuestionThe split size is normally the size of a ________ block, which is appropriate for most applications.
a) Generic b) Task c) Library d) HDFS Answer: d Explanation: FileInputFormat splits only large files(Here “large” ...
View QuestionWhich of the following writes MapFiles as output?
a) DBInpFormat b) MapFileOutputFormat c) SequenceFileAsBinaryOutputFormat d) None of the mentioned Answer: c Explanation: SequenceFileAsBinaryOutputFormat writes keys ...
View QuestionWhich of the following is the default output format?
a) TextFormat b) TextOutput c) TextOutputFormat d) None of the mentioned Answer: c Explanation: TextOutputFormat keys and ...
View Question___________ is an input format for reading data from a relational database, using JDBC.
a) DBInput b) DBInputFormat c) DBInpFormat d) All of the mentioned Answer: b Explanation: DBInputFormat is the most frequently used format for reading ...
View Question_________ 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: b Explanation: One might be ...
View Question__________ 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: b Explanation: With multiple reducers, ...
View QuestionPoint out the wrong statement.
a) Hadoop sequence file format stores sequences of binary key-value pairs b) SequenceFileAsBinaryInputFormat is a variant of SequenceFileInputFormat ...
View Question_________ is the output produced by TextOutputFor mat, Hadoop default OutputFormat.
a) KeyValueTextInputFormat b) KeyValueTextOutputFormat c) FileValueTextInputFormat d) All of the mentioned Answer: b Explanation: To interpret ...
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