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

Explain briefly what is Action in Apache Spark? How is final result generated using an action?

326

Describe the distnct(),union(),intersection() and substract() transformation in Apache Spark RDD?

315

Define Spark-SQL?

297

Explain the repartition() operation in Spark?

305

Compare Transformation and Action in Apache Spark?

297

How does pipe operation writes the result to standard output in Apache Spark?

373

Explain how you can get exactly once messaging from kafka during data production?

560

What is combiner aggregator?

639

When do you call the cleanup method?

551

What are the key benefits of using storm for real time processing?

576

Mention what is the meaning of broker in kafka?

543

What is zeromq?

558

How do you define a partitioning key?

568

Explain how to write the output into a file using storm?

593

Which components are used for stream flow of data?

603

Un-Answered Questions { Hadoop }

What are the advantages of pig language?

919

What is apache presto?

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

747

What is zeromq?

558

Is hive an impala requirement?

What is combiner aggregator?

639

Why would nosql be better than using a sql database? And how much better is it?

518

What do you mean by schema on read?

756

What platform and Java version is required to run Hadoop?

693

How Apache Pig deals with the schema and schema-less data?

619

Does spark use yarn?

270

How can you add a new partition for the month December in the above partitioned table?

712

Define primary key in Apache Cassandra?

What are the 2 modes used to run pig scripts?

649

Can you explain the term, Cassandra?

109

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