What is a speculative execution in Apache Hadoop MapReduce?
What is Disk Balancer in Apache Hadoop?
What hadoop does in safe mode?
How many Daemon processes run on a Hadoop system?
What is a “Distributed Cache” in Apache Hadoop?
Do we need to give a password, even if the key is added in ssh?
How to restart Namenode?
Why do we use Hadoop?
How a task is scheduled by a jobtracker?
What is a Combiner?
Explain the basic architecture of Hadoop?
What happens in a textinputformat?
what is the default replication factor in HDFS?