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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?

 36

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?

 91

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?

 297

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

 332

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

 365

What is the task of Spark Engine

 311

Un-Answered Questions { Hadoop }

How kafka communicate with clients and servers?

491

Specify the partitions in hive?

621

List the steps in which Cassandra writes changed data into commitlog?

209

What is Text Input Format?

625

How can you check all the tables present in a single database using Sqoop?

5

How can you connect an application

980

What are producer-consumer queues?

1

What are the limitations of the Pig?

525

What does it mean by Columnar Storage Format?

281

Explain why the name ‘hadoop’?

644

What is mapreduce algorithm?

551

Mention what does the shell commands “capture” and “consistency” determines?

79

What is the role of the ZooKeeper in Kafka?

495

What is a commodity hardware? Does commodity hardware include RAM?

491

What do you know about the speculative execution?

422

For More Un-Answered { Hadoop } Questions Click Here