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 catalyst query optimizer in apache spark?

293

What are the various types of shared variable in apache spark?

293

Define the common faults of the developer while using apache spark?

289

What is the use of spark driver, where it gets executed on the cluster?

370

What is speculative execution in spark?

322

Explain write ahead log(journaling) in spark?

271

Explain values() operation in apache spark?

498

Define the level of parallelism and its need in spark streaming?

391

Define sparksession in apache spark? Why is it needed?

275

Describe different transformations in dstream in apache spark streaming?

306

In hadoop_pid_dir, what does pid stands for?

525

What are the network requirements for hadoop?

474

What does hadoop-env.sh do?

450

Which are the three modes in which hadoop can be run?

478

Where is hadoop-env.sh file present?

484

Un-Answered Questions { Big Data }

State use cases of impala?

What are the data manipulation commands of hbase?

201

Explain the term commitlog?

Explain what does the conf.setMapper Class do in MapReduce?

660

Explain why do we need hadoop?

672

Clarify how ordering in hdfs is finished?

496

What is the difference between Reducer and Combiner in Hadoop MapReduce?

680

What are the main methods of data transferring in hadoop sqoop?

Explain pig architecture?

552

Explain HCatalog Architecture in Brief?

Explain what is hbase?

153

Define Spark Streaming.

413

While reading data from hbase, from which three places data will be reconciled before returning the value?

198

List down the languages supported by Apache Spark?

293

What is flume used for?

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