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

How to enable trash/recycle bin in hadoop?

741

What is small file problem in hadoop?

790

What are the default configuration files that are used in hadoop?

693

What exactly is hadoop?

696

Can we do online transactions(oltp) using hadoop?

669

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

695

What is output format in hadoop?

686

How to enable/configure the compression of map output data in hadoop?

768

What hadoop does in safe mode?

656

What is inputformat in hadoop?

751

Explain how input and output data format of the hadoop framework?

716

when hadoop enter in safe mode?

749

How to enable recycle bin or trash in hadoop?

708

Whats is distributed cache in hadoop?

681

what should be the ideal replication factor in hadoop?

656

Un-Answered Questions { Hadoop }

What are the all tasks we can perform for managing services using the ambari service tab?

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

What is fluming?

161

What language is apache kafka written in?

535

How can you start the kafka server?

580

Is hadoop required for spark?

304

What are the limitations of importing RDBMS tables into Hcatalog directly?

946

Can we run unix shell commands from hive? Can hive queries be executed from script files? How? Give an example.

809

What is write ahead log(journaling)?

310

How is the distance between two nodes defined in Hadoop?

1458

Discuss the precautions that are needed to take care while adding a column?

Explain about hlog and wal in hbase.

305

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

673

What do you understand by data center in cassandra?

What is Cassandra-CQL collection?

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