Thursday 23 April 2015

Hadoop Interview Questions 2015 - Part 2

Explain Build in sort mechanism to sort a file with single column with Billion records.

Default sort mechanism used in MapReduce?

How does a data of 200MB will be read by Mapper when block size is 64MB?

Explain secondary sort,Map&Reduce side joins

How to specify string as delimiter in hive?

Working with Counters: https://www.mapr.com/blog/managing-monitoring-and-testing-mapreduce-jobs-how-work-counters#.VU62SflVikohttps://www.mapr.com/blog/managing-monitoring-and-testing-mapreduce-jobs-how-work-counters#.VU62SflViko

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 A good reference for Shell scripting  https://linuxcommand.org/lc3_writing_shell_scripts.php