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?

104

What are “Seed Nodes” in Cassandra?

294

What do you understand by High availability?

Un-Answered Questions { Big Data }

What are the different execution mode available in Pig?

1014

What are keywords?

Define commit log?

Do we require two servers for the namenode and the datanodes?

487

What does it indicate if replica stays out of ISR for a long time?

686

Define Writable data types in Hadoop MapReduce?

599

What is a dataframe spark?

221

Tell me about the types of hbase operations?

171

What jobtracker is in hadoop? What are the activities followed by hadoop?

391

What is lambda in spark?

281

Can you run spark without hadoop?

302

How can you use producer api code?

478

if you run Hive as a server?

871

Can you explain the common input formats in hadoop?

476

Explain plucktuple?

528

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