What do the master class and the output class do?
Is hadoop a database?
What is Writable & WritableComparable interface?
What are the port numbers of namenode, job tracker and task tracker?
Explain the features of stand alone (local) mode?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
Can NameNode and DataNode be a commodity hardware?
What is the difference between hadoop and other data processing tools?
What are the functionalities of jobtracker?
Explain what happens in textinformat ?
Is fs.mapr.working.dir a single directory?
Mention what are the data components used by Hadoop?
What is a checkpoint?