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?

385

What are the various levels of persistence in Apache Spark?

320

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

443

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

456

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 }

Explain some of the basic commands used for Apache Ambari server?

What are file permissions in HDFS and how HDFS check permissions for files or directory?

Are Namenode and job tracker on the same host?

1457

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1308

What is the logistic regression?

436

What is session in Cassandra?

157

Explain how do ‘map’ and ‘reduce’ work?

606

Why scala is used in spark?

328

In a given spark program, how will you identify whether a given operation is Transformation or Action ?

340

What is mahout hadoop?

Give the name of some components of Cassandra?

How much is flume worth?

Define a daemon?

667

What is sink processors?

Use of import-all-tables command in hadoop sqoop?

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