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

What is the module in HDFS?

 34

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?

 27

What is Hadoop HDFS – Hadoop Distributed File System?

 38

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

 34

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?

 32

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?

 69

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

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

29

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

46

Explain the hdfs architecture?

47

What is hdfs in big data?

38

Why HDFS performs replication, although it results in data redundancy?

97

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

53

how does hdfs ensure data integrity of data blocks stored in hadoop hdfs?

37

Why do we need hdfs?

50

What is Fault Tolerance in HDFS?

39

What is Fault Tolerance in Hadoop HDFS?

37

What are file permissions in HDFS? how does HDFS check permissions for files/directory?

49

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

38

Why is block size set to 128 MB in HDFS?

39

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?

37

How to create Users in hadoop HDFS?

71

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