Daily Archives: May 17, 2014


Mapreduce Interview Questions and Answers for Experienced Part – 3 2

Below are a few more hadoop mapreduce interview questions and answers for experienced and freshers hadoop developers. Hadoop Mapreduce Interview Questions and Answers for Experienced: 1. ¬†After restart of namenode, Mapreduce jobs started failing which worked fine before restart. What could be the wrong ? The cluster could be in a safe mode after the restart of a namenode. The administrator needs to wait for namenode to exit the safe […]