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?

387

What are the various levels of persistence in Apache Spark?

320

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

444

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

458

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

344

Explain about the major libraries that constitute the Spark Ecosystem?

417

Un-Answered Questions { Hadoop }

What are the functions of presto?

What does adminclient api in kafka?

526

When NameNode enter in Safe Mode?

Define lzo?

198

Name commonly-used Spark Ecosystems

309

What are Guarantees provided by Kafka?

522

In which language ambari shell is developed?

Explain Erasure Coding in Apache Hadoop?

751

Explain different transformations in DStream in Apache Spark Streaming?

330

What is a "Spark Executor"?

349

Difference between Sqoop and Cassandra?

Who invented the first spark plug?

234

What does rack awareness algorithm means?

488

Define a namenode?

662

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

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