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Can hadoop replace relational database?
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What is streaming access?
If datanodes increase, then do we need to upgrade namenode?
What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
Explain Data Locality in Hadoop?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
Which are the three modes in which hadoop can be run?
Where is hadoop-env.sh file present?
What are the different commands used to startup and shutdown Hadoop daemons?
What happen when namenode enters in safemode in hadoop?
How does speculative execution work in Hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
Can hadoop replace relational database?
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