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Apache HDFS Hadoop Distributed File System Interview Questions
Questions Answers Views Company eMail

What is hdfs block size?

 55

How hdfs is different from traditional file systems?

 47

How is hdfs block size different from traditional file system block size?

 48

How data or a file is written into hdfs?

 50

What is a namenode in hadoop?

 46

What is secondary namenode?

 50

What do you mean by meta data in hdfs? List the files associated with metadata.

 32

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

 47

Can you modify the file present in hdfs?

 78

Define data integrity?

 33

What do you mean by the high availability of a namenode? How is it achieved?

 35

Hdfs stores data using commodity hardware which has higher chances of failures. So, how hdfs ensures the fault tolerance capability of the system?

 24

Define hadoop archives?

 27

What is secondary namenode? Is it a substitute or back up node for the namenode?

 52

What is the command for archiving a group of files in hdfs.

 37

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

Replication causes data redundancy and consume a lot of space, then why is it pursued in hdfs?

39

What is the command for archiving a group of files in hdfs.

37

How HDFS client divide the file into the block while storing inside HDFS?

60

Explain the difference between an hdfs block and input split?

61

What is the difference between nas (network attached storage) and hdfs?

50

Why HDFS stores data using commodity hardware despite the higher chance of failures?

36

What is the module in HDFS?

36

HDFS is used for applications with large data sets, not why Many small files?

38

What is a difference between an input split and hdfs block?

72

How much Metadata will be created on NameNode in Hadoop?

54

What do you mean by the high availability of a namenode?

29

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

32

Explain the process that overwrites the replication factors in HDFS?

51

Explain how are file systems checked in hdfs?

44

What do you mean by metadata in HDFS?

55

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