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

What is the module in HDFS?

 36

Tell me two most commonly used commands in HDFS?

 38

What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?

 60

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

 38

What is throughput? How does HDFS provide good throughput?

 30

File permissions in HDFS?

 29

What is Hadoop HDFS – Hadoop Distributed File System?

 38

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

 37

What is Block in HDFS?

 40

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

 34

Can multiple clients write into an HDFS file concurrently?

 63

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

 64

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

 41

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

 60

What is the difference between Input Split and an HDFS Block?

 72

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

List the files associated with metadata in hdfs?

32

What is the problem in having lots of small files in hdfs?

42

How to create directory in HDFS?

52

What is the optimal block size in HDFS?

40

How can one set space quota in Hadoop (HDFS) directory?

28

What is active and passive NameNode in HDFS?

226

Can multiple clients write into an HDFS file concurrently in hadoop?

70

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

52

Explain the hdfs architecture?

47

Why HDFS?

36

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

44

How to copy file from HDFS to local?

49

How is NFS different from HDFS?

49

Explain the difference between mapreduce engine and hdfs cluster?

106

Can you explain about the indexing process in hdfs?

36

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