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 happens to a namenode, when job tracker is down?

689

What does the command mapred.job.tracker do?

717

How to come out of the insert mode?

715

What is the full form of fsck?

664

Why do we need a password-less ssh in fully distributed environment?

676

Can you give us some more details about ssh communication between masters and the slaves?

649

Can you tell us more about ssh?

672

What is shark?

274

Name a few commonly used spark ecosystems?

266

What is hive on spark?

370

Can we do real-time processing using spark sql?

291

How sparksql is different from hql and sql?

468

What is a parquet file?

263

How to split single hdfs block into partitions rdd?

How does data transfer happen from hdfs to hive?

145

Un-Answered Questions { Big Data }

Does if offer scaling?

What are shared variables in spark?

275

Why do we need MapReduce during Pig programming?

603

What relational operators can we use that are related to combining and splitting in Pig language?

522

What are the different String functions available in pig?

771

What is the significance of Sliding Window operation?

290

Why does one remove or add nodes in a Hadoop cluster frequently?

646

What do you understand by Commit log in Cassandra?

Where does spark plug get power?

267

What is the InputSplit in map reduce ?

987

List some use cases where classification machine learning algorithms can be used.

422

What is the difference between persist

331

How to Delete directory from HDFS?

What do you know about sequencefileinputformat?

590

In what ways sparksession different from sparkcontext?

319

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