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

Explain the hdfs architecture?

 55

How does hdfs provides good throughput?

 52

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

 56

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

 37

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?

 125

List the files associated with metadata in hdfs?

 34

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

 54

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

 37

What is a block?

 57

What is throughput? How does hdfs provides good throughput?

 56

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

 43

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

 41

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

 34

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

 50

What is a rack awareness algorithm?

 58

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

Is namenode also a commodity?

41

How to read file in HDFS?

50

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 hdfs get a good throughput?

61

How HDFS helps NameNode in scaling in Hadoop?

58

What is the difference between NAS and HDFS?

75

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

31

Does hdfs enable a customer to peruse a record, which is already opened for writing?

34

What are the main features of hdfssite.xml?

31

What do you mean by metadata in Hadoop?

40

How are file systems checked in hdfs?

25

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

31

Why is block size set to 128 MB in HDFS?

42

How to access HDFS?

46

What is a rack awareness algorithm?

58

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