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?

406

What are the various levels of persistence in Apache Spark?

326

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

467

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

479

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

362

Explain about the major libraries that constitute the Spark Ecosystem?

433

Un-Answered Questions { Hadoop }

what should be the ideal replication factor in hadoop?

697

What are the configuration files in Hadoop?

575

What is the problem with small files in Hadoop?

567

What is Cassandra-CQL collection?

What is SequenceFileInputFormat in Hadoop MapReduce?

669

What are the uses of explode hive?

769

What is a namenode in hadoop?

Can you define inputsplit in hadoop?

516

What is a Seed Node in Cassandra ?

Which command is used to run hbase shell?

176

explain the concept of RDD (Resilient Distributed Dataset). Also, state how you can create RDDs in Apache Spark.

424

What is an "RDD Lineage"?

315

What is spark configuration?

354

Can NameNode and DataNode be a commodity hardware?

1732

when hadoop enter in safe mode?

794

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