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

What is hdfs block size?

 51

How hdfs is different from traditional file systems?

 42

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

 44

How data or a file is written into hdfs?

 44

What is a namenode in hadoop?

 39

What is secondary namenode?

 44

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

 26

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

 42

Can you modify the file present in hdfs?

 71

Define data integrity?

 27

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

 25

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

 21

Define hadoop archives?

 22

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

 41

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

 32

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

Define data integrity?

27

What is hdfs block size?

51

What is active and passive NameNode in HDFS?

152

How to create Users in hadoop HDFS?

66

What is Fault Tolerance in Hadoop HDFS?

33

On what basis name node distribute blocks across the data nodes in HDFS?

39

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

44

What is the difference between MapReduce engine and HDFS cluster?

89

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

32

Does HDFS allow a client to read a file which is already opened for writing in hadoop?

36

How does data transfer happen from hdfs to hive?

129

Would you be able to change the block size of hdfs files?

39

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

47

Explain how indexing is done in hdfs?

32

Explain NameNode and DataNode in HDFS?

40

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