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?

132

What are secondary indexes?

103

What is the design architecture of Cassandra?

Who uses Cassandra?

JMX stands for?

110

What are the different features of Cassandra?

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

234

What is the primary objective of NoSQL databases?

What is Cassandra Query Language?

What are the different components of Cassandra?

111

What are “Seed Nodes” in Cassandra?

302

What do you understand by High availability?

Un-Answered Questions { Big Data }

What is the difference between leader and follower in kafka?

610

What is javardd?

303

What do you understand by the term snitch in cassandra? Give some example.

What happens when a DataNode fails during the write process?

702

Is spark and hadoop same?

282

What is available mechanism for connecting from applications, when we run hive as a server?

819

How can you connect an application, if you run hive as a server?

756

Define replication factor?

104

How many maximum jvm can run on a slave node?

728

What webdav is in hadoop?

482

List the various HDFS daemons in HDFS cluster?

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1142

What do you understand by cassandra?

Explain Data Type Conversion in Hive?

767

Is it possible to leverage real-time analysis of the big data collected by Flume directly? If yes, then explain how?

148

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