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?

313

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

303

Define Spark-SQL?

281

Explain the repartition() operation in Spark?

289

Compare Transformation and Action in Apache Spark?

284

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

365

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

523

What is combiner aggregator?

592

When do you call the cleanup method?

526

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

543

Mention what is the meaning of broker in kafka?

507

What is zeromq?

524

How do you define a partitioning key?

539

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

547

Which components are used for stream flow of data?

577

Un-Answered Questions { Hadoop }

What is bookkeeper?

Cassandra is written in which language?

Why we use BloomMapFile?

602

Why Flume?

180

Explain transformation in rdd. How is lazy evaluation helpful in reducing the complexity of the system?

346

Detail description of the Reducer phases?

852

What can I do with my m&s sparks points?

323

What is bag?

677

What does adminclient api in kafka?

527

Is hadoop based on google mapreduce?

692

Where is spark used?

367

How will you design or modify schema in hbase programmatically?

157

What does the Spark Engine do?

323

While installing, why does apache have three config files - srm.conf, access.conf and httpd.conf?

572

How do we represent data in Spark?

357

For More Un-Answered { Hadoop } Questions Click Here