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  1. Categories >> Software >> Big Data >> Hadoop >> Apache HDFS Hadoop Distributed File System
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Apache HDFS Hadoop Distributed File System Interview Questions
Questions Answers Views Company eMail

What are the main hdfs-site.xml properties?

 41

What do you mean by the High Availability of a NameNode in Hadoop HDFS?

 35

How does HDFS ensure Data Integrity of data blocks stored in HDFS?

 41

How to remove safemode of namenode forcefully in HDFS?

 36

Who divides the file into Block while storing inside hdfs in hadoop?

 49

What are file permissions in HDFS? how does HDFS check permissions for files/directory?

 53

How one can change Replication factor when Data is already stored in HDFS

 44

Explain HDFS “Write once Read many” pattern?

 34

Why is block size set to 128 MB in HDFS?

 43

What should be the HDFS Block size to get maximum performance from Hadoop cluster?

 37

What is the importance of dfs.namenode.name.dir in HDFS?

 58

How one can format Hadoop HDFS?

 47

Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

 42

How to format the HDFS? How frequently it will be done?

 36

Which one is the master node in HDFS? Can it be commodity hardware?

 47

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

Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?

47

What is a block?

58

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

52

What is the difference between input split and hdfs block?

91

Can you change the block size of hdfs files?

45

What is active and passive NameNode in HDFS?

228

What happens when two clients try to access the same file on HDFS?

185

How can one copy a file into HDFS with a different block size to that of existing block size configuration?

48

What is the difference between NAS and HDFS?

75

How does data transfer happen from hdfs to hive?

148

Can you explain about the indexing process in hdfs?

36

How to remove safemode of namenode forcefully in HDFS?

36

Clarify the difference between nas and hdfs.

35

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

49

How to format the HDFS? How frequently it will be done?

36

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