What is Apache Hadoop YARN?
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What is speculative execution in Hadoop?
Have you ever used Counters in Hadoop. Give us an example scenario?
What is a heartbeat in HDFS?
explain Metadata in Namenode?
What are different types of filesystem?
What is hbase in hadoop?
What do the master class and the output class do?
Explain how do ‘map’ and ‘reduce’ works?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What happens to a NameNode that has no data?
What is Hadoop Custom partitioner ?
What is the full form of fsck?
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