Explain the common input formats in hadoop?
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How jobtracker assign tasks to the tasktracker?
Where is hadoop-env.sh file present?
What does rack awareness mean?
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?
Can you explain edge nodes in hadoop?
Can you explain record reader?
Can you explain bloommapfile.
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
What is the key difference between NameNode and DataNode in Hadoop?
Explain what is speculative execution?
How namenode handles data node failures?
Can we deploy job tracker other than name node?
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