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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?

 65

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 }

What is the difference between input split and hdfs block?

106

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

39

Explain NameNode and DataNode in HDFS?

62

If the source data gets updated every now and then, how will you synchronize the data in hdfs that is imported by sqoop?

162

How data or file is written into Hadoop HDFS?

48

How does hdfs give great throughput?

45

What is the throughput?

51

Does the HDFS go wrong? If so, how?

54

Does hdfs enable a customer to peruse a record, which is already opened for writing?

38

How data or a file is written into hdfs?

64

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

42

Data node block size in HDFS, why 64MB?

57

How does hdfs get a good throughput?

69

How does hdfs provides good throughput?

60

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

66

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