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?

291

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?

368

What is speculative execution in spark?

322

Explain write ahead log(journaling) in spark?

266

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?

304

In hadoop_pid_dir, what does pid stands for?

524

What are the network requirements for hadoop?

474

What does hadoop-env.sh do?

445

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 }

Explain Multi-tenancy?

555

Define a job tracker?

702

When to avoid secondary indexes?

What are the benefits of lazy evaluation?

303

What happens when the node running the map task fails before the map output has been sent to the reducer?

649

What are the execution modes in the apache pig?

510

Who invented hadoop?

685

Explain about ACID transactions in Hive?

732

Explain about the different types of transformations on DStreams?

387

List the various options available with the Hive command?

903

What are the different database elements of cassandra?

Is it important for Hadoop MapReduce jobs to be written in Java?

845

How can you store the data in spark?

322

what is hadoop archive?

921

What are ‘reduces’?

703

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