What is partioner in hadoop? Where does it run,mapper or reducer?
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what should be the ideal replication factor in hadoop?
What is HDFS block size and what did you chose in your project?
How many instances of tasktracker run on a hadoop cluster?
Can you explain how do ‘map’ and ‘reduce’ work?
What happens to a namenode, when job tracker is down?
How to enable recycle bin in hadoop?
What is the full form of fsck?
What alternate way does HDFS provides to recover data in case a Namenode
Can the balancer be run while Hadoop is in use?
What does /var/hadoop/pids do?
What is the jobtracker?
What's the best way to copy files between HDFS clusters?
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