Explain what is hadoop?
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Why would nosql be better than using a sql database? And how much better is it?
Compare Apache Hadoop and Apache Spark?
What is the job tracker role in hadoop?
What is the non dfs used?
What is a namenode?
In hadoop_pid_dir, what does pid stands for?
Does hadoop follows the unix pattern?
Why do the nodes are removed and added frequently in a hadoop cluster?
Clarify what a task tracker is in hadoop?
What a task tracker is in hadoop?
what if job tracker machine is down?
How does hadoop achieve fault tolerance?
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