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 the difference between Job and Task in MapReduce?

659

Compare Pig vs Hive vs Hadoop MapReduce?

726

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

676

How to submit extra files(jars, static files) for Hadoop MapReduce job during runtime?

684

How to get the single file as the output from MapReduce Job?

683

Why is output file name in Hadoop MapReduce part-r-00000?

679

Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

651

Explain the process of spilling in Hadoop MapReduce?

700

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

652

What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

693

What are the benefits of Spark over MapReduce?

697

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

676

Why do we need MapReduce during Pig programming?

715

What is difference between a MapReduce InputSplit and HDFS block

728

What is lineage graph in Apache Spark?

361

Un-Answered Questions { Hadoop }

Explain the difference between Spark SQL and Hive.

402

Explain edge nodes in hadoop?

479

How can you use adminclient api?

618

Can you explain combiner?

481

What is cqlsh? And why is it used?

Can you tell us more about ssh?

762

What is the difference between external table and managed table?

1017

Why HDFS stores data using commodity hardware despite the higher chance of failures?

What is a combiner in hadoop?

554

Which database the sqoop metastore runs on?

Explain sum(), max(), min() operation in Apache Spark?

315

Describe DataStaxOpsCenter?

176

Define Partitions?

333

What is spark shuffle?

284

What are the main benefits of using cassandra?

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