What is the difference between Hadoop and Traditional RDBMS?
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What is Distributed Cache?
Does this lead to security issues?
Explain the difference between NameNode
What do the master class and the output class do?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
Explain what is sqoop in Hadoop ?
What is inputsplit in hadoop? Explain.
What is the communication channel between client and namenode/datanode?
How to Administering Hadoop?
Explain the features of pseudo mode?
How the Client communicates with HDFS?
What is the heartbeat used for?
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