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

Explain the hdfs architecture?

45

How does hdfs provides good throughput?

40

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

46

How will you perform the inter cluster data copying work in hdfs?

27

Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

113

List the files associated with metadata in hdfs?

22

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

42

What is a rack awareness algorithm and why is it used in hadoop?

25

What is a block?

42

What is throughput? How does hdfs provides good throughput?

50

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

35

Define hadoop archives? What is the command for archiving a group of files in hdfs.

27

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

22

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

43

What is a rack awareness algorithm?

52


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

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

56


What is the throughput? How does hdfs give great throughput?

48


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

40


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

32


How does hdfs ensure information integrity of data blocks squares kept in hdfs?

23






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?

29


Can you modify the file present in hdfs?

71


What happens if the block on Hadoop HDFS is corrupted?

47


Explain about the indexing process in hdfs?

64


Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

113


How to split single hdfs block into partitions rdd?

38


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

53


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

44


How data or file is read in HDFS?

30


Mention what is the difference between hdfs and nas?

59