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?

306

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

309

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

308

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

396

What is speculative execution in spark?

348

Explain write ahead log(journaling) in spark?

284

Explain values() operation in apache spark?

538

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

404

Define sparksession in apache spark? Why is it needed?

289

Describe different transformations in dstream in apache spark streaming?

323

In hadoop_pid_dir, what does pid stands for?

586

What are the network requirements for hadoop?

527

What does hadoop-env.sh do?

489

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

543

Where is hadoop-env.sh file present?

540

Un-Answered Questions { Big Data }

State syntax of the command that is used to drop a partition?

Explain the architecture of Hadoop Pig?

792

What are the different String functions available in pig?

852

Can you explain commodity hardware?

458

Where does Big Data come from?

703

What language is apache kafka written in?

588

Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

720

Give some points of pig for hadoop ?

588

What is the Hadoop MapReduce API contract for a key and value Class?

1357

What is the need of key-value pair to process the data in MapReduce?

721

What is coalesce in spark sql?

329

What is SuperColumn in Cassandra?

111

How to Rename a table in Hive

799

Can hadoop handle streaming data?

495

Why we use intwritable instead of int? Why we use longwritable instead of long?

536

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