How did you debug your Hadoop code ?
How to enable recycle bin in hadoop?
What do you know about nlineoutputformat?
Is hadoop obsolete?
What do you know about sequencefileinputformat?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
what factors the block size takes before creation?
What happens to job tracker when namenode is down?
What are the steps to submit a Hadoop job?
Can you tell us more about ssh?
What is the communication channel between client and namenode/datanode?
How many instances of tasktracker run on a hadoop cluster?
Explain the benefits of block transfer?