What do you understand from Node redundancy and is it exist in hadoop cluster?
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Explain what if rack 2 and datanode fails?
Which are the three main hdfs-site.xml properties?
What is a speculative execution in Apache Hadoop MapReduce?
What are the hadoop's three configuration files?
What problems can be addressed by using Zookeeper?
How to keep HDFS cluster balanced?
What does /etc /init.d do?
Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?
How many maximum jvm can run on a slave node?
Can we have multiple entries in the master files?
when hadoop enter in safe mode?
Is hadoop a database?