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

What is HDFS?

24

Why HDFS?

22

How to Delete file from HDFS?

39

How to keep files in HDFS?

38

How is NFS different from HDFS?

32

Why is block size large in Hadoop?

38

Distinguish HDFS Block and Input Unit?

24

What are the difference between of the “HDFS Block” and “Input Split”?

54

What happens when two users try to access to the same file in HDFS?

45

Does the HDFS go wrong? If so, how?

32

Why is HDFS only suitable for large data sets and not the correct tool to use for many small files?

31

What happens when two clients try to access the same file on HDFS?

102

What are the different file permissions in the HDFS for files or directory levels?

77

How to read file in HDFS?

32

When NameNode enter in Safe Mode?

23


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

How data or file is written into Hadoop HDFS?

20


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

42


What is throughput? How does hdfs provides good throughput?

44


How HDFS helps NameNode in scaling in Hadoop?

34


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

34






Is the hdfs block size reduced to achieve faster query results?

24


What is a rack awareness algorithm?

39


While processing data from hdfs, does it execute code near data?

24


How to split single hdfs block into partitions rdd?

27


What is the difference between NAS and HDFS?

53


How to transfer data from Hive to HDFS?

24


What is Secondary NameNode in Hadoop HDFS?

48


How to create Users in hadoop HDFS?

58


List the files associated with metadata in hdfs?

20


How would you import data from MYSQL into HDFS ?

28