How many instances of tasktracker run on a hadoop cluster?
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What are different types of filesystem?
How is HDFS fault tolerant?
What is a “Distributed Cache” in Apache Hadoop?
How can you overwrite the replication factors in HDFS?
What are active and passive "NameNodes"?
What is output format in hadoop?
How to enable/configure the compression of map output data in hadoop?
What is the port number for NameNode
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
How can we check whether namenode is working or not?
what is difference between int and intwritable?
Define a commodity hardware? Does commodity hardware include ram?
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