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Hadoop Interview Questions
Questions Answers Views Company eMail

Explain Erasure Coding in Hadoop?

503

What is Disk Balancer in Hadoop?

511

How would you check whether your NameNode is working or not?

420

Is Namenode machine same as DataNode machine as in terms of hardware?

460

If DataNode increases, then do we need to upgrade NameNode?

549

What happens if the number of reducers is 0 in Hadoop?

481

Why is Data Block size set to 128 MB in Hadoop?

439

What is a Heartbeat in Hadoop?

560

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

What is a Backup node in Hadoop?

559

What do you mean by the NameNode High Availability in hadoop?

495

What is the default replication factor in Hadoop and how will you change it?

590

Why Hadoop performs replication, although it results in data redundancy?

1279

What is Balancer in Hadoop?

472

What is active and passive NameNode in Hadoop?

463


Un-Answered Questions { Hadoop }

How do you handle compression in pig?

561


Mention what is HiveServer2 (HS2)?

787


Clarify how hive de-serialize and serialize the information?

641


List some benefits of apache kafka?

540


Mention if we can name view same as the name of a Hive table?

689


What is the need of MapReduce in Hadoop?

629


What causes breaker to spark?

300


What is catalyst query optimizer in apache spark?

293


What is the latest version of ambari that is available in the market and what is the feature that they have added in it?

81


What is the point of apache spark?

284


What are the applications of Apache ZooKeeper?

5


What are shared variables in spark?

304


Explain Machine Learning library in Spark?

285


Use of export command in hadoop sqoop?

5


What is apache flume used for?

76