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

Big Data Interview Questions

Questions Answers Views Company eMail

What is LazyOutputFormat in Hadoop?

495

What is Identity reducer?

520

What is Chain Mapper?

558

What are the core methods of a Reducer?

511

What are the parameters of mappers and reducers?

489

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

508

How is the splitting of file invoked in Hadoop ?

534

How many InputSplits will be made by hadoop framework?

492

Explain the usage of Context Object?

476

Define Cassandra?

What are the parameters used to create a keyspace?

112

Describe Network Topology Strategy?

132

Give the difference between Drop and Truncate in CQLSH?

How can a user get the information on the version of CQLSH?

Define Simple Strategy?

128

Un-Answered Questions { Big Data }

Explain what is a Hive variable. What do we use it for?

722

Explain why to use hbase?

157

Mention when you can use alter keyspace?

Should the region server be located on all DataNodes?

442

What is DataFrames?

367

what is next step after mapper or maptask?

428

What is Cassandra-CQL collection?

What is difference between hive and spark?

266

When to use coalesce and repartition in spark?

319

Explain the process of spilling in Hadoop MapReduce?

631

Do we need to install spark in all nodes?

276

What are the different components of a Hive architecture?

837

What is presto verifier?

What is spark vcores?

279

Explain about the basic parameters of mapper and reducer function

1046

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