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Mention what are the data components used by Hadoop?
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What happens to job tracker when namenode is down?
what is a datanode?
Can we do online transactions(oltp) using hadoop?
what factors the block size takes before creation?
How many maximum jvm can run on a slave node?
Do we need to give a password, even if the key is added in ssh?
What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
Which are the two types of 'writes' in HDFS?
What happens to a NameNode that has no data?
What do you know about keyvaluetextinputformat?
What is the main purpose of HDFS fsck command?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
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