Apache HDFS Hadoop Distributed File System Interview Questions
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Why do we need hdfs?

44

What is hdfs in big data?

31

Explain how are file systems checked in hdfs?

19

How are file systems checked in hdfs?

16


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Un-Answered Questions { Apache HDFS Hadoop Distributed File System }

How to Delete directory from HDFS?

26


What do you mean by metadata in HDFS?

42


What is the difference between namenode, backup node and checkpoint namenode?

38


Explain about the indexing process in hdfs?

44


What alternate way does HDFS provides to recover data in case a Namenode, without backup, fails and cannot be recovered?

20






Why do we need hdfs?

44


What is Fault Tolerance in HDFS?

29


What is hdfs block size?

45


Replication causes data redundancy then why is is pursued in HDFS?

25


Why is block size large in Hadoop?

42


If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

19


Why is block size set to 128 MB in Hadoop HDFS?

36


What is Secondary NameNode in Hadoop HDFS?

50


How to change the replication factor of data which is already stored in HDFS?

23


What are file permissions in HDFS and how HDFS check permissions for files or directory?

26