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?

553

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

589

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

750

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

578

What is struct and explain its purpose?

514

How can we kill a topology?

548

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

571

what is the traditional method of message trfer?

567

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 }

What is the NameNode port number?

400

List the various HDFS daemons in HDFS cluster?

Is the hdfs block size reduced to achieve faster query results?

What is heartbeat in hdfs? Explain.

681

What is the usefulness of the distributed by clause in hive?

738

Explain bucketing in Hive?

847

Explain accumulators in apache spark.

2074

Explain Spark Streaming with Socket?

323

Does Partitioner run in its own JVM or shares with another process?

706

What is an Agent?

What is the Virtual Node in Cassandra ?

What is a Combiner?

742

What is the use of shutdown command?

210

Before deploying the hadoop instance, what are the checks that an individual should do?

What is the standalone mode in spark cluster?

271

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