Can you explain rack awareness?
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Can you explain bloommapfile.
Why do we need Hadoop?
What are the benefits yarn brings in to hadoop?
What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
Can you give a detailed overview about the Big Data being generated by Facebook?
What is a udf?
List Hadoop’s three configuration files?
What a task tracker is in hadoop?
Mention what does the text input format do?
Define a sequence file in hadoop?
Explain how can you check whether namenode is working beside using the jps command?
What is the problem with small files in Hadoop?
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