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 your favourite tool in the hadoop ecosystem?

958

What is the function of NodeManager?

907

Difference between SQL and HiveQL ?

1 3559

what is pig?

836

What are the steps involved in MapReduce framework?

981

explain Metadata in Namenode?

917

What is a 'block' in HDFS?

976

What is Derby database?

902

How many Daemon processes run on a Hadoop system?

1101

What are the limitations of importing RDBMS tables into Hcatalog directly?

944

How the Client communicates with HDFS?

1063

What is NoSQL?

922

What is Row Key?

981

What is a Task instance in Hadoop? Where does it run?1

853

What does the overwrite keyword denote in Hive load statement?

1 2509

Un-Answered Questions { Hadoop }

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

769

What are input format, input split & record reader and what they do?

623

How to configure hadoop to reuse JVM for mappers?

1201

What are the roles and responsibilities of worker nodes in the Apache Spark cluster? Is Worker Node in Spark is same as Slave Node?

356

How to Containerizing ZooKeeper With Docker?

Explain the data model of hbase.

165

How can we assure that the values regarding a particular key goes to the same reducer?

607

What is pregel api?

307

Can Ambari manage multiple clusters?

Is apache spark a tool?

270

Explain a common use case for Flume?

What are the major features/characteristics of rdd (resilient distributed datasets)?

307

What is the use of cassandra and why to use cassandra?

153

Are job tracker and task trackers present in separate machines?

462

How to explain Bigdatadeveloper projects

590

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