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 input type/format in mapreduce by default?

624

What is difference the between sqoop and distcp?

Can you explain edge nodes in hadoop?

475

Explain some important features of hadoop?

490

Why do we need hadoop for big data analytics?

475

What are the important modes of hadoop?

580

Can you explain the common input formats in hadoop?

571

Explain how are file systems checked in hdfs?

What are the different catalog tables in hbase?

180

Explain edge nodes in hadoop?

476

What are the important features of hadoop?

485

Explain the common input formats in hadoop?

515

How are file systems checked in hdfs?

What is cassandra used for?

Can hadoop replace relational database?

475

Un-Answered Questions { Hadoop }

How can one copy a file into HDFS with a different block size to that of existing block size configuration?

How can apache spark be used alongside hadoop?

1821

How client application interacts with the NameNode?

993

Define speculative execution?

767

Can you explain recommendation engine?

What is the difference betwaeen mapreduce engine and hdfs cluster?

Compare Transformation and Action in Apache Spark?

297

Explain about the different types of transformations on DStreams?

406

Explain the difference between mahout & mllib?

What is executor cores in spark?

305

Compare Pig vs Hive vs Hadoop MapReduce?

722

What is a Task instance in Hadoop? Where does it run?1

888

Mention what is the hadoop mapreduce apis contract for a key and value class?

733

Explain the uses of Map Reduce in Pig?

583

Differentiate between GROUP and COGROUP operators?

675

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