Daily Archives: June 19, 2015


100 Hadoop Certification Dump Questions 8

Hadoop Certification Dump Questions 1. From given below which describes how a client reads a file from HDFS?  ( 1 ) The client queries all DataNodes in parallel. The DataNode that contains the requested data responds directly to the client. The client reads the data directly from the DataNode. The client contacts the NameNode for the block location(s). The NameNode then queries the DataNodes for block locations. The DataNodes respond […]


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I have attended Siva’s Spark and Scala training. He is good in presentation skills and explaining technical concepts easily to everyone in the group. He is having excellent real time experience and provided enough use cases to understand each concepts. Duration of the course and time management is awesome. Happy that I found a right person on time to learn Spark. Thanks Siva!!!

Dharmeswaran ETL / Hadoop Developer Spark Nov 2016 September 21, 2017

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