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

What is the module in HDFS?

 53

Tell me two most commonly used commands in HDFS?

 46

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

 72

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

 42

What is throughput? How does HDFS provide good throughput?

 36

File permissions in HDFS?

 37

What is Hadoop HDFS – Hadoop Distributed File System?

 50

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

 43

What is Block in HDFS?

 60

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

 48

Can multiple clients write into an HDFS file concurrently?

 74

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

 142

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

 47

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

 69

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

 80

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

Define HDFS and talk about their respective components?

57

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

60

What is a block?

65

What is the throughput?

51

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

47

Can multiple clients write into a Hadoop HDFS file concurrently?

57

What is a task tracker?

54

How one can format Hadoop HDFS?

55

How does hdfs get a good throughput?

69

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

82

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

66

Why do we need hdfs?

60

What is throughput? How does HDFS provide good throughput?

36

How to restart NameNode or all the daemons in Hadoop HDFS?

63

What is the difference between NAS and HDFS?

80

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