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Big Data Interview Questions
Questions Answers Views Company eMail

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

614

Explain what is storage and compute nodes?

512

Explain how jobtracker schedules a task?

465

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

439

What happens in text format?

436

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

445

Explain what is a task tracker in hadoop?

452

Explain what is speculative execution?

423

Explain what happens in text format?

573

Mention what is distributed cache in hadoop?

440

Explain how can you debug hadoop code?

466

Explain how can you check whether namenode is working beside using the jps command?

431

Explain what is webdav in hadoop?

508

Mention what job does the conf class do?

422

For using hadoop list the network requirements?

471


Un-Answered Questions { Big Data }

What is coalesce in spark sql?

311


What is the difference between logical and physical plans?

554


What are the different Eval functions available in Pig?

562


How can we assure that the values regarding a particular key goes to the same reducer?

607


What is presto verifier?

5


Differentiate between PigLatin and Hive?

689


What happens to a NameNode that has no data?

1585


What is Disk Balancer in Hadoop?

513


How much does flume cost?

77


Can you give us some examples, how Hadoop is used in real time environment?

703


What do you understand by cluster in cassandra?

90


What do you know about transformations in spark?

289


What is a namenode in hadoop?

52


What is scala spark?

301


Explain the features of pseudo mode?

702