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Hadoop Interview Questions
Questions Answers Views Company eMail

What is Fault Tolerance in HDFS?

 59

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

 43

How does a client read/write data in HDFS?

 47

What is the difference between MapReduce engine and HDFS cluster?

 106

Explain NameNode and DataNode in HDFS?

 62

How data or file is read in HDFS?

 47

How is indexing done in HDFS?

 59

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

 39

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

 146

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

 37

What are the key features of HDFS?

 46

How can one set space quota in Hadoop (HDFS) directory?

 38

Explain how HDFS communicates with Linux native file system?

 55

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

 42

Replication causes data redundancy then why is is pursued in HDFS?

 59

Un-Answered Questions { Hadoop }

Explain Accumulator in Spark?

467

List the functions of Spark SQL?

503

What is the use of apache mahout?

42

What are channel selectors?

1086

Is there a module to implement sql in spark?

295

What do you mean by Free Form Import in Sqoop?

5

What do you understand by mapreduce?

693

what happens in textinformat ?

712

What is a spark context?

290

How to set which framework would be used to run mapreduce program?

750

What are the characteristics of hadoop framework?

701

Which Sorting algorithm is used in Hadoop MapReduce?

636

What are the components used in Hive query processor?

909

How does broadcast join work in spark?

319

List down the segments of a hive question processor?

688

For More Un-Answered { Hadoop } Questions Click Here