What is HDFS ? How it is different from traditional file systems?
What do sorting do?
What does job conf class do?
What is the difference between SQL and NoSQL?
What if rack 2 and datanode fails?
What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?
How to resolve IOException: Cannot create directory
Why password is needed in ssh localhost?
What are the network requirements for using hadoop?
How you can contact your client everyday ?
Explain what is sqoop in Hadoop ?
Where do you specify the Mapper Implementation?
Why do we need a password-less ssh in fully distributed environment?