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

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

 46

Why rack awareness algorithm is used in hadoop?

 41

Can you change the block size of hdfs files?

 45

Explain about the indexing process in hdfs?

 73

Explain what is difference between an input split and hdfs block?

 74

Replication causes data redundancy then why is pursued in hdfs?

 47

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

 41

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

 40

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

 74

Explain hdfs?

 58

Explain the key features of hdfs?

 32

How does hdfs get a good throughput?

 61

Explain how indexing is done in hdfs?

 43

Explain the difference between mapreduce engine and hdfs cluster?

 131

Explain the difference between an hdfs block and input split?

 61

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

What is hdfs in big data?

38

What is hdfs block size?

57

What does heartbeat in hdfs means?

30

Will various customers write into an hdfs record simultaneously?

42

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

38

How does a client read/write data in HDFS?

41

Mention what is the best way to copy files between hdfs clusters?

73

Can we have different replication factor of the existing files in hdfs?

56

What is the throughput?

47

Distinguish HDFS Block and Input Unit?

43

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

43

How HDFS helps NameNode in scaling in Hadoop?

58

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

37

In HDFS, how Name node determines which data node to write on?

56

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

42

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