How would you check whether your NameNode is working or not?
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What is JPS? Why is it used in Hadoop?
What are the common types of NOSQL data bases ?
What does the mapred.job.tracker command do?
How to use combiner in hadoop ?
Why is Data Block size set to 128 MB in Hadoop?
What is the command to change the replication factor ?
Can you give a detailed overview about the Big Data being generated by Facebook?
What is rack awareness in hadoop?
Does hadoop follows the unix pattern?
Clarify how ordering in hdfs is finished?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
What happen if a datanode loses network connection for a few minutes?
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