What do you know about sequencefileinputformat?
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What is the difference between rdbms and hadoop?
what is the default replication factor in HDFS?
Which files are used by the startup and shutdown commands?
what should be the ideal replication factor in hadoop?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
What is Rack awareness?
What are active and passive "NameNodes"?
What happens to a namenode, when job tracker is down?
Which one is default InputFormat in Hadoop ?
What are channel selectors?
How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
What does job conf class do?
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