Q. Which of the following class provides a subset of features provided by the Unix/GNU Sort?

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Q. Which of the following class is provided by the Aggregate package?

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Q. Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix ______ utility.

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Q. ___________ generates keys of type LongWritable and values of type Text.

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Q. In _____________ the default job is similar, but not identical, to the Java equivalent.

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Q. An input _________ is a chunk of the input that is processed by a single map.

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

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

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Q. Which of the following is the only way of running mappers?

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Q. _________ is the base class for all implementations of InputFormat that use files as their data source.

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Q. Which of the following method add a path or paths to the list of inputs?

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Q. ___________ takes node and rack locality into account when deciding which blocks to place in the same split.

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Q. The key, a ____________ is the byte offset within the file of the beginning of the line.

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Q. _________ is the output produced by TextOutputFor mat, Hadoop default OutputFormat.

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

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

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Q. ___________ is an input format for reading data from a relational database, using JDBC.

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Q. Which of the following is the default output format?

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Q. Which of the following writes MapFiles as output?

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Q. The split size is normally the size of a ________ block, which is appropriate for most applications.

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