Mention what is the use of Context Object?
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What is the default block size in hdfs?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
Explain how can we change the split size if our commodity hardware has less storage space?
On which port does ssh work?
How to Administering Hadoop?
Can you explain how do ‘map’ and ‘reduce’ work?
How Mapper is instantiated in a running job?
How does master slave architecture in the hadoop?
How indexing is done in HDFS?
What is Schema on Read and Schema on Write?
How client application interacts with the NameNode?
What's the best way to copy files between HDFS clusters?