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?

796

What does the command mapred.job.tracker do?

833

How to come out of the insert mode?

840

What is the full form of fsck?

747

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

762

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

742

Can you tell us more about ssh?

762

What is shark?

301

Name a few commonly used spark ecosystems?

303

What is hive on spark?

403

Can we do real-time processing using spark sql?

322

How sparksql is different from hql and sql?

511

What is a parquet file?

304

How to split single hdfs block into partitions rdd?

How does data transfer happen from hdfs to hive?

157

Un-Answered Questions { Big Data }

Name the ports Cassandra uses?

How many instances of a jobtracker run on hadoop cluster?

688

What does apache spark do?

338

What do you understand by Lazy Evaluation?

393

Who uses apache spark?

370

Name the examples of some companies that are using hadoop structure?

730

Does Apache Flume provide support for third party plug-ins?

Why do I have to use refresh and invalidate metadata, what do they do?

What are the debugging tools used for Apache Pig scripts?

826

what is difference between pig and sql?

2662

How is machine learning implemented in spark?

349

Difference between external table and internal table in HIVE ?

973

Differentiate between FileSink and FileRollSink?

107

Define the term ‘sparse vector.’

297

On which port does ssh work?

790

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