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

What is hdfs block size?

 71

How hdfs is different from traditional file systems?

 59

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

 56

How data or a file is written into hdfs?

 64

What is a namenode in hadoop?

 57

What is secondary namenode?

 64

What do you mean by meta data in hdfs? List the files associated with metadata.

 36

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

 53

Can you modify the file present in hdfs?

 96

Define data integrity?

 44

What do you mean by the high availability of a namenode? How is it achieved?

 47

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

 38

Define hadoop archives?

 37

What is secondary namenode? Is it a substitute or back up node for the namenode?

 70

What is the command for archiving a group of files in hdfs.

 45

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

Explain how are file systems checked in hdfs?

55

What is Block in HDFS?

60

Mention what is the best way to copy files between hdfs clusters?

79

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

98

How much Metadata will be created on NameNode in Hadoop?

62

Explain NameNode and DataNode in HDFS?

62

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

82

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

58

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

43

What do you mean by the High Availability of a NameNode in Hadoop HDFS?

43

What is throughput? How does hdfs provides good throughput?

67

Compare hbase vs hdfs?

44

What is Fault Tolerance in Hadoop HDFS?

47

Which classes are used by the hive to read and write hdfs files?

78

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

43

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