In hadoop_pid_dir, what does pid stands for?
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What is rack awareness in hadoop?
Can you define udf?
What is the difference between a hadoop database and relational database?
What is KeyValueTextInputFormat in Hadoop?
Can you explain record reader?
Why do the nodes are removed and added frequently in a hadoop cluster?
How can native libraries be included in yarn jobs?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
What is the block size in Hadoop?
Name the files which are used by the startup and shutdown commands?
Do we require two servers for the namenode and the datanodes?
What are the most common InputFormats in Hadoop?
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