what are Task Tracker and Job Tracker?
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Define fault tolerance?
What are the important differences between apache and hadoop?
What are sink processors?
What is partioner in hadoop? Where does it run,mapper or reducer?
On what basis data will be stored on a rack?
What is the difference between HDFS and NAS ?
Define streaming?
What is the heartbeat used for?
How to keep HDFS cluster balanced?
What are the port numbers of namenode, job tracker and task tracker?
How does an hadoop application look like or their basic components?
What is your favourite tool in the hadoop ecosystem?