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

How data or file is written into Hadoop HDFS?

 38

In HDFS, how Name node determines which data node to write on?

 50

What is Secondary NameNode in Hadoop HDFS?

 66

How to restart NameNode or all the daemons in Hadoop HDFS?

 59

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

 36

Can multiple clients write into a Hadoop HDFS file concurrently?

 47

On what basis name node distribute blocks across the data nodes in HDFS?

 43

Why is Reading done in parallel and writing is not in HDFS?

 44

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

 68

How to create Users in hadoop HDFS?

 71

How to transfer data from Hive to HDFS?

 39

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

 32

What is Hadoop Distributed File System- HDFS?

 40

What is throughput in HDFS?

 60

How to split single hdfs block into partitions rdd?

 44

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

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

61

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

36

Explain what is difference between an input split and hdfs block?

69

Explain how HDFS communicates with Linux native file system?

36

Why is block size set to 128 MB in HDFS?

39

Why HDFS?

36

What is the procedure to create users in HDFS and how to allocate Quota to them?

39

Clarify the difference between nas and hdfs.

35

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

53

Explain the process that overwrites the replication factors in HDFS?

51

What is Hadoop HDFS – Hadoop Distributed File System?

38

What alternate way does HDFS provides to recover data in case a Namenode, without backup, fails and cannot be recovered?

31

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

32

Define hadoop archives?

27

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

69

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