What platform and java version are required to run hadoop?
How to change replication factor of files already stored in HDFS?
What are the most commonly defined input formats in Hadoop?
How blocks are distributed among all data nodes for a particular chunk of data?
when hadoop enter in safe mode?
What is commodity hardware?
Can we do online transactions(oltp) using hadoop?
What is Safemode in Apache Hadoop?
What is Apache Hadoop?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
How to come out of the insert mode?
What is a task instance in hadoop? Where does it run?
Explain the wordcount implementation via hadoop framework ?