Define a job tracker?
What are different types of filesystem?
What are the most commonly defined input formats in Hadoop?
What is zookeeper in hadoop?
What is a heartbeat in HDFS?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is Hadoop serialization?
What's the best way to copy files between HDFS clusters?
Explain how input and output data format of the hadoop framework?
What if a namenode has no data?
What are the default configuration files that are used in hadoop?
Why the name ‘hadoop’?
How do you categorize a big data?
What is the relation between job and task in hadoop?
What is the purpose of DataNode block scanner?