What are channel selectors?
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What hadoop does in safe mode?
What are the hadoop's three configuration files?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
Why do we need a password-less ssh in fully distributed environment?
What will you do when NameNode is down?
how would you modify that solution to only count the number of unique words in all the documents?
What is a heartbeat in HDFS?
What infrastructure do we need to process 100 TB data using Hadoop?
Which files are used by the startup and shutdown commands?
What is the best hardware configuration to run Hadoop?
What is the difference between a Hadoop and Relational Database and Nosql?
How would you tackle counting words in several text documents?
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