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Hadoop Interview Questions
Questions Answers Views Company eMail

how is a file of the size 1 GB uncompressed

 692

Is map like a pointer?

 781

What is the default replication factor?

 808

What should be the ideal replication factor in Hadoop Cluster?

 2 2655

How can one increase replication factor to a desired value in Hadoop?

 925

In Map Reduce why map write output to Local Disk instead of HDFS?

 767

What is a Record Reader in hadoop?

 812

What is version-id mismatch error in hadoop?

 890

how to share the metastore within multiple users?

 759

What is a partitioner and how the user can control which key will go to which reducer?

 754

Hive for Hadoop - Give some points?

 1 1730

How do you define "block" in HDFS?

 736

Where is the Mapper Output intermediate kay-value data stored ?

 1182

How does Mappers run method works?

 731

What are the components of Apache Pig platform?

 610

Un-Answered Questions { Hadoop }

Do I need scala for spark?

246

Differentiate between the various types of primary keys in cassandra.

76

Explain Spark Driver?

285

Can you explain spark mllib?

239

Explain the use of tasktracker in the hadoop cluster?

503

What are the different tools used for the ambari monitoring purpose?

48

What is ZooKeeper Atomic Broadcast (ZAB) protocol?

5

Whether the output of mapper or output of partitioner written on local disk?

539

What is the difference between reducebykey and groupbykey?

243

What is connection_loss error?

1

What is Replication Factor in Cassandra?

65

Differentiate between Hadoop MapReduce and Pig?

502

Name a few commonly used spark ecosystems?

240

Explian the Limitations of HBase?

175

How much is flume worth?

63

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