Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

I have a row or key cache hit rate of 0.XX123456789 reported by JMX. Is that XX% or 0.XX% ?

When to avoid secondary indexes?

What ports does Cassandra use?

When should you not use Cassandra? OR When to use RDBMS instead of Cassandra?

124

What are secondary indexes?

What is the design architecture of Cassandra?

Who uses Cassandra?

JMX stands for?

What are the different features of Cassandra?

What happens to existing data in my cluster when I add new nodes?

203

What is the primary objective of NoSQL databases?

What is Cassandra Query Language?

What are the different components of Cassandra?

103

What are “Seed Nodes” in Cassandra?

294

What do you understand by High availability?

Un-Answered Questions { Big Data }

Elaborate on Identifiers?

113

Clarify what is sequence file input format?

487

What combiners are and when you should utilize a combiner in a map reduce job?

559

When would you use hbase?

178

Please enumerate the various components of the Spark Ecosystem.

367

Which is the reliable channel in Flume to ensure that there is no data loss?

127

Explain Zookeeper Leader election?

Difference between external table and internal table in HIVE ?

873

What is secondary namenode? Is it a substitute or back up node for the namenode?

What are the advantages of pig language?

813

What is the advantage of using –password-file rather than -P option while preventing the display of password in the sqoop import statement?

What are the independent extensions that are contributed to the ambari codebase?

Is hadoop based on google mapreduce?

627

Can you define oozie?

468

Use of list-databases command in hadoop sqoop?

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