What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
How is the splitting of file invoked in Hadoop framework?
Is it possible to provide multiple input to Hadoop? If yes then how?
Is it possible to have hadoop job output in multiple directories? If yes, how?
What is the default replication factor and how will you change it?
Explain Hadoop Archives?
Explain the Single point of Failure in Hadoop?
Explain Erasure Coding in Hadoop?
What is Disk Balancer in Hadoop?
How would you check whether your NameNode is working or not?
Is Namenode machine same as DataNode machine as in terms of hardware?
If DataNode increases, then do we need to upgrade NameNode?
What happens if the number of reducers is 0 in Hadoop?
Why is Data Block size set to 128 MB in Hadoop?
What is a Heartbeat in Hadoop?