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List out some common problems faced by data analyst?
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Is Namenode machine same as DataNode machine as in terms of hardware?
How can you set an arbitrary number of Reducers to be created for a job in Hadoop?
Define data cleansing?
Is there another way to check whether Namenode is working?
What webdav is in hadoop?
Mention what is rack awareness?
How can one write custom record reader?
Explain about Hadoop file system and processing framework?
What is the default replication factor and how will you change it?
In hadoop_pid_dir, what does pid stands for?
Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?
Explain how jobtracker schedules a task?
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