What is the Use of SSH in Hadoop ?
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Explain how input and output data format of the hadoop framework?
How did you debug your Hadoop code ?
Did you ever ran into a lop sided job that resulted in out of memory error
What is the communication channel between client and namenode/datanode?
Is client the end user in HDFS?
What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?
How client application interacts with the NameNode?
Does google use hadoop?
What is the problem with HDFS and streaming data like logs
What is a speculative execution in Apache Hadoop MapReduce?
Explain how do ‘map’ and ‘reduce’ works?
How to change replication factor of files already stored in HDFS?
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