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WithoutBook LIVE Mock Interviews Hadoop Related interview subjects: 74

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Ques 2

What platform and Java version are required to run Hadoop?

Java 1.6.x or higher versions are good for Hadoop, preferably from Sun. Linux and Windows are the supported operating system for Hadoop, but BSD, Mac OS/X, and Solaris are more famous for working.

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Ques 4

What are the most common input formats defined in Hadoop?

These are the most common input formats defined in Hadoop:

  1. TextInputFormat
  2. KeyValueInputFormat
  3. SequenceFileInputFormat

TextInputFormat is a by default input format.

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Ques 11

What is TextInputFormat in Hadoop?

In TextInputFormat, each line in the text file is a record. Value is the content of the line while Key is the byte offset of the line. For instance, Key: longWritable, Value: text

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