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 do you understand by an inner bag and outer bag in Pig?

884

Explain different execution modes available in Pig?

828

How do users interact with HDFS in Apache Pig ?

800

what are the basic parameters of a Mapper?

869

What is a MapReduce Combiner?

849

Where is Mapper output stored?

906

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

826

Is it possible to split 100 lines of input as a single split in MapReduce?

1014

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

931

Is it possible to rename the output file?

841

how JobTracker schedules a task ?

908

what is NameNode in Hadoop?

943

what does the conf.setMapper Class do ?

865

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

825

What is SequenceFileInputFormat?

866

Un-Answered Questions { Hadoop }

How can you use consumer api?

554

What are the different collection type in Hive?

750

What is hive metastore?

755

In MapReduce Data Flow, when Combiner is called?

718

Explain about the different complex data types in Pig?

702

What is DStream in Apache Spark Streaming?

331

How can we launch Spark application on YARN?

444

What is streaming in Hadoop?

468

What is spark sqlcontext?

312

What is indexing and why do we need it?

858

Does hadoop always require digital data to process?

1216

What is nagios is used in ambari?

109

Is apache spark in demand?

281

Difference between external table and internal table in HIVE ?

970

What is isr?

595

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