What is a Task instance in Hadoop? Where does it run?1
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Does this lead to security issues?
Define streaming access?
Explain what if rack 2 and datanode fails?
What should be the ideal replication factor in Hadoop Cluster?
What is hbase in hadoop?
What is small file problem in hadoop?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
what is meaning Replication factor?
What is 'Key value pair' in HDFS?
What is the meaning of speculative execution in Hadoop? Why is it important?
Can you give us some more details about ssh communication between masters and the slaves?
Explain the Job OutputFormat?