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

What happens if the block on Hadoop HDFS is corrupted?

56

What is a block in HDFS, why block size 64MB?

51

How NameNode tackle Datanode failures in HDFS?

32

How is indexing done in Hadoop HDFS?

48

How to perform the inter-cluster data copying work in HDFS?

44

What are the main properties of hdfs-site.xml file?

46

Describe HDFS Federation?

38

What is active and passive NameNode in HDFS?

226

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

38

How data or file is read in Hadoop HDFS?

33

How HDFS helps NameNode in scaling in Hadoop?

58

What is Fault Tolerance in Hadoop HDFS?

39

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

46

What is a Block Scanner in HDFS?

89

Differentiate HDFS & HBase?

40


Post New Apache HDFS Hadoop Distributed File System Questions

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

What is a job tracker?

36


How data or file is written into HDFS?

50


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

60


How to transfer data from Hive to HDFS?

41


What do you mean by metadata in HDFS?

55


What do you mean by meta information in hdfs? List the documents related to metadata.

28


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

47


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


Explain the difference between nas and hdfs?

34


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

48


Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

40


What is active and passive NameNode in HDFS?

226


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

35


Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?

31


What is the difference between input split and hdfs block?

89