Explain the features of fully distributed mode?
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Explain use cases where SequenceFile class can be a good fit?
What are the port numbers of namenode, job tracker and task tracker?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Explain what is sqoop in Hadoop ?
How to resolve small file problem in hdfs?
What happens to a NameNode that has no data?
What happens to a namenode, when job tracker is down?
What is yarn in hadoop?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
How we can take Hadoop out of Safe Mode?
What is the function of ApplicationMaster?
What is Your Cluster size ?
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