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 the architecture of Hadoop Pig?

761

What is the difference between Apache Pig and Hive?

607

What is the difference between Pig and MapReduce?

609

Explain Features of Pig?

673

What is Pig Storage?

604

While writing evaluate UDF, which method has to be overridden?

573

What are the different UDF’s in Pig?

654

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

907

What are the core components of Apache Hadoop?

784

What is the difference between Apache Hadoop and RDBMS?

807

How is security achieved in Apache Hadoop?

909

What is Apache Hadoop?

852

What is a “Distributed Cache” in Apache Hadoop?

777

What is the problem with small files in Apache Hadoop?

783

What is Rack Awareness in Apache Hadoop?

811

Un-Answered Questions { Hadoop }

What is the function of consistency cqlsh command in Cassandra?

Define Partitions?

319

JMX stands for?

108

Which is better hadoop or spark?

290

What is ganglia is used for in ambari?

What is spark in big data?

304

What is a partitioner and how the user can control which key will go to which reducer?

939

What problem does Apache Flume solve?

101

What is a map side join?

685

What are ‘maps’ and ‘reduces’?

696

What is difference between hive and spark?

266

Discuss about the different tombstone markers used for deletion purposes in HBase.?

185

What is Thrift?

Explain what happens if you alter the block size of a column family on an already occupied database?

168

Wherever (Different Directory) I run the hive query, it creates new metastore_db, please explain the reason for it?

747

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