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 the spark driver?

341

What is big data spark?

332

How does lazy evaluation work in spark?

304

What is the use of dataframe in spark?

306

When should you use spark cache?

307

How do I start a spark server?

311

What is executor and driver in spark?

299

Is apache spark an etl tool?

304

What is a spark context?

290

Where is rdd stored?

327

What is apache spark engine?

306

Is hadoop mandatory for spark?

297

What is map in spark?

345

Is spark written in java?

326

How do I start a spark cluster?

320

Un-Answered Questions { Big Data }

Can you explain rack awareness?

482

Define fsck?

571

Explain what is namenode in hadoop?

486

Explain about hlog and wal in hbase.

312

What is the use of recordreader in hadoop?

466

What is contextual routing in flume?

824

Can you explain apache ambari?

What does ‘jps’ command do?

727

What do you understand by Commit log in Cassandra?

What is the difference between Primary, Partition and Cassandra ?

What happen when namenode enters in safemode in hadoop?

479

Where is apache spark used?

295

How to set mappers and reducers for Hadoop jobs?

665

In MapReduce Data Flow, when Combiner is called?

722

What is Flume?

114

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