Explain the features of stand alone (local) mode?

672

What is IdentityMapper?

1045

Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

780

What is Hadoop serialization?

742

What alternate way does HDFS provides to recover data in case a Namenode

995

What is HDFS Federation?

1026

What other technologies have you used in hadoop sta ck?

1016

How to keep HDFS cluster balanced?

1132

On what basis Namenode will decide which datanode to write on?

1299

What are the Basics of Hadoop?

965

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

759

What is zookeeper in hadoop?

688

How many JVMs run on a slave node?

1089

In which location Name Node stores its Metadata and why?

1424

How to exit the vi editor?

773