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Hadoop Interview Questions
Questions Answers Views Company eMail

What is impala?

130

Why we need impala hadoop?

43

What is the maximum number of rows in a table?

48

Describe impala shell (impala-shell command)?

42

Can any impala query also be executed in hive?

82

State some advantages of impala?

36

Does impala use caching?

44

How are joins performed in impala?

103

What are distinct operators in impala?

42

What is troubleshooting for impala?

75

Can impala be used for complex event processing?

169

How do I configure hadoop high availability (ha) for impala?

51

How do I know how many impala nodes are in my cluster?

160

What are the differences between relational databases and impala?

52

On which hosts does impala run?

45


Un-Answered Questions { Hadoop }

How will you perform the inter cluster data copying work in hdfs?

45


How much is flume worth?

81


What is a broker?

555


What is a bag in Pig Latin?

897


Define functions of SparkCore?

514


How will you calculate the number of executors required to do real-time processing using Apache Spark? What factors need to be considered for deciding on the number of nodes for real-time processing?

316


What is SSTable?

90


Explain HCatLoader and HCatStorer APIs?

5


Why use hadoop?

474


How can we have to see all the clusters that are available in ambari?

48


How can I import large objects (BLOB and CLOB objects) in Apache Sqoop?

5


What is pipelined rdd?

267


Who should learn Apache Ambari?

50


Define "Action" in Spark

317


What MapReduce framework consists of?

1153