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  1. Categories >> Software >> Big Data >> Hadoop >> Apache HDFS Hadoop Distributed File System
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Apache HDFS Hadoop Distributed File System Interview Questions
Questions Answers Views Company eMail

What is NameNode and DataNode in HDFS?

 55

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

 42

What are file permissions in HDFS and how HDFS check permissions for files or directory?

 40

How data or file is written into HDFS?

 55

What is throughput? How does HDFS get a good throughput?

 58

What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

 49

List the various HDFS daemons in HDFS cluster?

 43

What is the difference between NAS and HDFS?

 80

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

 37

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

 98

What is the optimal block size in HDFS?

 46

What do you mean by metadata in HDFS?

 61

Data node block size in HDFS, why 64MB?

 57

What happens if the block in HDFS is corrupted?

 43

What is Fault Tolerance in HDFS?

 59

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

Write command to copy a file from HDFS to linux(local).

54

What happens if the block in HDFS is corrupted?

43

What is active and passive NameNode in HDFS?

232

Which one is the master node in HDFS? Can it be commodity hardware?

53

Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?

53

What is Hadoop HDFS – Hadoop Distributed File System?

50

Explain how HDFS communicates with Linux native file system?

55

Write the command to copy a file from linux to hdfs?

69

What should be the HDFS Block size to get maximum performance from Hadoop cluster?

41

Can multiple clients write into an HDFS file concurrently in hadoop?

82

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

60

What do you mean by block scanner in hdfs?

48

What are file permissions in HDFS and how HDFS check permissions for files or directory?

40

What is the throughput?

51

Replication causes data redundancy then why is is pursued in HDFS?

59

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