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

Explain the hdfs architecture?

 63

How does hdfs provides good throughput?

 60

Can we have different replication factor of the existing files in hdfs?

 66

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

 45

Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

 129

List the files associated with metadata in hdfs?

 40

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

 60

What is a rack awareness algorithm and why is it used in hadoop?

 44

What is a block?

 65

What is throughput? How does hdfs provides good throughput?

 67

Replication causes data redundancy and consume a lot of space, then why is it pursued in hdfs?

 51

Define hadoop archives? What is the command for archiving a group of files in hdfs.

 52

What do you mean by the high availability of a namenode?

 38

What is the difference between nas (network attached storage) and hdfs?

 54

What is a rack awareness algorithm?

 68

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

Can we have different replication factor of the existing files in hdfs?

66

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

43

What is the optimal block size in HDFS?

46

Tell me two most commonly used commands in HDFS?

46

What is non-dfs used in hdfs web console

75

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

35

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

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

37

Can you change the block size of hdfs files?

61

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

41

Explain the difference between an hdfs block and input split?

67

How to Delete file from HDFS?

65

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

46

Explain the difference between mapreduce engine and hdfs cluster?

144

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