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Hadoop Interview Questions
Questions Answers Views Company eMail

Does cloudera offer a vm for demonstrating impala?

 43

How do I try impala out?

 54

How does impala compare to hive and pig?

 38

How does impala achieve its performance improvements?

 33

Can I use impala to query data already loaded into hive and hbase?

 47

What happens when the data set exceeds available memory?

 93

How much memory is required?

 76

Are results returned as they become available, or all at once when a query completes?

 60

Why do I have to use refresh and invalidate metadata, what do they do?

 60

Why does my select statement fail?

 41

Does impala performance improve as it is deployed to more hosts in a cluster in much the same way that hadoop performance does?

 164

What is RDD in Apache Spark? How are they computed in Spark? what are the various ways in which it can create?

 320

What role does worker node play in Apache Spark Cluster? And what is the need to register a worker node with the driver program?

 346

What is SparkSession in Apache Spark? Why is it needed?

 378

What is the task of Spark Engine

 328

Un-Answered Questions { Hadoop }

What are the capabilities of kafka?

552

What is a pipelinedrdd?

435

Mention what job does the conf class do?

422

When should you use sequencefileinputformat?

662

How can we kill a topology?

546

What are the main components of a Hadoop Application?

1039

Name commonly-used Spark Ecosystems

309

What are the disadvantages of using Spark?

309

State some Ambari components which we can use for automation as well as integration?

110

What are Paired RDD?

315

What are the actions in spark?

273

Can you explain spark streaming?

307

why use hcolumndescriptor class?

153

What is an input reader in reference to mapreduce?

622

Is spark used for machine learning?

281

For More Un-Answered { Hadoop } Questions Click Here