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f901c92b44 14. Do keep coming back as we put up new blogs every week on all your favorite topics. Sorting occurs only on the reducer side. 4) Explain about the different channel types in Flume. With more than 30,000 open Hadoop developer jobs, professionals must familiarize themselves with the each and every component of the Hadoop ecosystem to make sure that they have a deep understanding of what Hadoop is so that they can form an effective approach to a given big data problem. purushotham Sr.Software Engineer Here is 2 cents 1. 8)Differentiate between NFS, Hadoop NameNode and JournalNode. We would love to invite people from the industry – hadoop developers, hadoop adminsand architects to kindly help us and everyone else – with answering the unanswered questions. After an in-depth technical interview, the interviewer might still not be satisfied and would like to test your practical experience in navigating and analysing big data.The expectation of the interviewer is to judge whether you are really interested in the open position and ready to work with the company, regardless of the technical knowledge you have on hadoop technology. What are the limitations of importing RDBMS tables into Hcatalog directly? There is an option to import RDBMS tables into Hcatalog directly by making use of –hcatalog –database option with the –hcatalog –table but the limitation to it is that there are several arguments like –as-avrofile , -direct, -as-sequencefile, -target-dir , -export-dir are not supported.
8) Does Apache Flume provide support for third party plug-ins? Most of the data analysts use Apache Flume has plug-in based architecture as it can load data from external sources and transfer it to external destinations. Click here to Tweet HDFS provides a distributed data copying facility through the DistCP from source to destination. For every event, sink calls the initialize method in the serializer which then translates the Flume Event into HBase increments and puts to be sent to HBase cluster. Depending on the block size, HDFS will continue storing the last part of the data. 10. 15. What is Hadoop streaming? Click here to Tweet Hadoop distribution has a generic application programming interface for writing Map and Reduce jobs in any desired programming language like Python, Perl, Ruby, etc. Why do we need replication factor > 1 in production Hadoop cluster? 3. Can we perform data blending of two different sources in tableau? 6.