How does a namenode handle the failure of the data nodes?
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Explain why the name ‘hadoop’?
What does /etc /init.d do?
What is the communication channel between client and namenode/datanode?
What are the different methods to run Spark over Apache Hadoop?
What's the best way to copy files between HDFS clusters?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
Explain the shuffle?
Can hbase run without hadoop?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is Hadoop streaming?
Explain how input and output data format of the hadoop framework?
What is Rack awareness?
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