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?

375

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

560

What is combiner aggregator?

644

When do you call the cleanup method?

554

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

578

Mention what is the meaning of broker in kafka?

547

What is zeromq?

558

How do you define a partitioning key?

570

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

597

Which components are used for stream flow of data?

603

Un-Answered Questions { Hadoop }

How to change the column data type in hive? Explain rlike in hive.

750

Why we use intwritable instead of int? Why we use longwritable instead of long?

531

Explain Spark Core?

325

What are the limitations of Hive?

1071

What is the role of zookeeper in hbase?

187

How can we have to see the all hosts that are available in the ambari?

Explain the various table design approaches in HBase?

138

How is mapreduce related to cloud computing?

711

Explain JobConf in MapReduce.

854

What is the relation between MapReduce and Hive?

698

What combiners are and when you should use a combiner in a mapreduce job?

658

What do you understand by Thrift?

What is the Cassandra Coefficient ?

Can you explain how you can use Apache Spark along with Hadoop?

323

What are Watches in ZooKeeper?

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