Hadoop Basic Interview Questions and Answers Part-5
41. Do we need to give a password, even if the key is added in SSH? Yes, password is still required even if the key is added in SSH. 42. What if a Namenode has no data? If a Namenode…
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41. Do we need to give a password, even if the key is added in SSH? Yes, password is still required even if the key is added in SSH. 42. What if a Namenode has no data? If a Namenode…
Read More31. Where is hadoop-env.sh file present? hadoop-env.sh file is present in the conf location. 32. In Hadoop_PID_DIR, what does PID stands for? PID stands for ‘Process ID’.
Read More21. How can we check whether Namenode is working or not? To check whether Namenode is working or not, use the command /etc/init.d/hadoop-0.20-namenode status or as simple as jps. 22. What does the command mapred.job.tracker do? The command mapred.job.tracker lists…
Read More11. How to exit the Vi editor? To exit the Vi Editor, press ESC and type :q and then press enter. 12. What is a spill factor with respect to the RAM? Spill factor is the size after which your…
Read More1. Which are the three modes in which Hadoop can be run? The three modes in which Hadoop can be run are: 1. standalone (local) mode 2. Pseudo-distributed mode 3. Fully distributed mode
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