How to keep HDFS cluster balanced?
What problems have you faced when you are working on Hadoop code?
What does /etc /init.d do?
What is the use of combiners in the hadoop framework?
What is a heartbeat in HDFS?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
what factors the block size takes before creation?
What is the default replication factor?
What is the communication channel between client and namenode/datanode?
How does master slave architecture in the hadoop?
Can the balancer be run while Hadoop is in use?
What happens in a textinputformat?
Define a combiner?