Is hadoop a database?
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Does Hadoop requires RAID?
What is a block and block scanner in HDFS?
What are the default configuration files that are used in hadoop?
What is the use of Combiner?
Can you explain how do ‘map’ and ‘reduce’ work?
How to enable recycle bin or trash in hadoop?
how can we change Replication Factor?
What is DistributedCache and its purpose?
What's the best way to copy files between HDFS clusters?
What is version-id mismatch error in hadoop?
On which port does ssh work?
What happens to a NameNode that has no data?
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