Define Balancer in HDFS.

Can you create more than one table in Hive for the same data file?

What role does Apache Hadoop’s distributed cache play?

What do you know about FSCK?

List the standard port numbers on which Hadoop’s task tracker, NameNode, and job tracker operate.

Describe streaming in Hadoop.

Describe the distributed Hadoop file system.

What happens when Block Scanner finds a faulty data block?

How does schema evolution work?

What are the differences between an operational database and a data warehouse?