What do you know about sequencefileinputformat?
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What is zookeeper in hadoop?
What does ‘jps’ command do?
How does a namenode handle the failure of the data nodes?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
How we can take Hadoop out of Safe Mode?
What is Partioner in hadoop? Where does it run
shouldn't DFS be able to handle large volumes of data already?
How is HDFS fault tolerant?
Does Hadoop requires RAID?
What is the communication channel between client and namenode/datanode?
Explain what if rack 2 and datanode fails?
Have you ever used Counters in Hadoop. Give us an example scenario?
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