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Apache HDFS Hadoop Distributed File System Interview Questions
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What is hdfs block size?

 45

How hdfs is different from traditional file systems?

 36

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

 36

How data or a file is written into hdfs?

 32

What is a namenode in hadoop?

 33

What is secondary namenode?

 28

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

 20

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

 30

Can you modify the file present in hdfs?

 61

Define data integrity?

 20

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

 18

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

 14

Define hadoop archives?

 16

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

 26

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

 26

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

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

32

What does hdfs mean?

24

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

18

What are the key features of HDFS?

26

Write the command to copy a file from linux to hdfs?

40




Can you explain about the indexing process in hdfs?

21

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

20

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

31

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

38

Clarify the difference between nas and hdfs.

21

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

31

What is a task tracker?

30

Differentiate HDFS & HBase?

28

What is Fault Tolerance in HDFS?

29

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

32

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