What do you understand by unit and ()in scala?
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Clarify how ordering in hdfs is finished?
What does the mapred.job.tracker command do?
What do you know about the speculative execution?
What happen if a datanode loses network connection for a few minutes?
What does the file hadoop-metrics.properties do?
Are job tracker and task trackers present in separate machines?
what is next step after mapper or maptask?
What does block mean?
What do you understand by standalone (or local) mode?
What is TaskTracker?
How to use combiner in hadoop ?
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