How would you check whether your NameNode is working or not?
Define a record reader?
What is LazyOutputFormat in Hadoop?
Explain what is a sequence file in hadoop?
Can you explain combiner?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What is streaming access?
What is the most widely recognized info formats characterized in hadoop?
Clarify what a task tracker is in hadoop?
Define a sequence file in hadoop?
Can you define a checkpoint?
What happen if one of the datanodes has much slower cpu?
How to do ‘map’ and ‘reduce’ works?
What is a namenode?
How jobtracker assign tasks to the tasktracker?