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

Mention what is the difference between apache kafka and apache storm?

597

Explain when using field grouping in storm, is there any time-out or limit to known field values?

627

Explain how you can reduce churn in isr? When does broker leave the isr?

813

Is it necessary to kill the topology while updating the running topology?

626

What is struct and explain its purpose?

575

How can we kill a topology?

597

While installing, why does apache have three config files - srm.conf, access.conf and httpd.conf?

611

what is the traditional method of message trfer?

610

What is the process of creating ambari client?

What are the three layers where the hadoop components are actually supported by ambari?

What are the other components of ambari that are important for automation and integration?

How many types of ambari repositories are available?

What bit version that ambari needs and also list out the operating systems that are compatible?

What are the core benefits for hadoop users by using apache ambari?

What is a local repository and when it is useful while using ambari environment?

Un-Answered Questions { Hadoop }

Differentiate between drop and truncate in cqlsh

How to perform the inter-cluster data copying work in HDFS?

What do you mean by Speculative execution in Apache Spark?

312

What are the file formats supported by spark?

315

Is it possible to use Apache Spark for accessing and analyzing data stored in Cassandra databases?

315

What is the concept of SuperColumn in Cassandra?

Why is Hive not suitable for OLTP systems?

817

Explain about tajo worker configuration?

How to change the replication factor of data which is already stored in HDFS?

What is master node in spark?

320

What are the usage of different consistency levels for write operations ?

How does apache spark work?

308

What is shuffling and sorting in Hadoop MapReduce?

683

Who is a 'user' in HDFS?

941

Explain what is the purpose of RecordReader in Hadoop?

787

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