What is the communication channel between client and namenode/datanode?
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What is a checkpoint?
Is it necessary to write jobs for hadoop in the java language?
Why do we use Hadoop?
What are different types of filesystem?
What is crontab? Explain with suitable example?
Can Apache Kafka be used without Zookeeper?
Explain the master class and the output class do?
Can you explain how do ‘map’ and ‘reduce’ work?
What are the most commonly defined input formats in Hadoop?
Explain what if rack 2 and datanode fails?
Is a job split into maps?
How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
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