Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is the ZooKeeper ensemble?

What are the possible Job roles?

What are the challenges Of Distributed Applications?

Explain the types Of Znodes?

Explain the CLI In Zookeeper?

What is ZooKeeper quorum?

What is the model of a ZooKeeper cluster?

What must we know to work on Zookeeper well?

What do you mean by ZNode?

Explain about the different types of transformations on DStreams?

371

What are the various levels of persistence in Apache Spark?

309

How can you trigger automatic clean-ups in Spark to handle accumulated metadata?

427

What are the disadvantages of using Apache Spark over Hadoop MapReduce?

446

Is it necessary to install spark on all the nodes of a YARN cluster while running Apache Spark on YARN ?

328

Explain about the major libraries that constitute the Spark Ecosystem?

402

Un-Answered Questions { Hadoop }

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

431

Explain the LOAD keyword in Pig script?

597

What do you understand by cassandra?

Name the three layers, Ambari supports?

what is Speculative Execution?

795

Can you use Spark for ETL process?

269

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

445

Explain Zookeeper Queues?

What happen if a datanode loses network connection for a few minutes?

558

What load do concurrent queries produce on the namenode?

As part of optimizing the queries in hive, what should be the order of table size in a join query?

673

Explain Reliability and Failure Handling in Apache Flume?

104

Can we change the body of the flume event?

What is the difference between scala and spark?

301

Can you define a block and block scanner in hdfs?

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