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

What is HBase?

355

What happens to a NameNode that has no data?

1537

What is a Hive Metastore?

1 1956

How can an application connect to Hive run as a server?

1103

What is a heartbeat in HDFS?

881

What are sink processors?

864

What is the reason for creating a new metastore_db whenever Hive query is run from a different directory?

948

Does hadoop always require digital data to process?

1120

what is meaning Replication factor?

900

What is the purpose of RawComparator interface?

1075

Where is the Mapper Output stored?

1331

What is the function of ApplicationMaster?

907

What problems can be addressed by using Zookeeper?

902

Can there be no Reducer?

810

What is Hadoop streaming?

987

Un-Answered Questions { Hadoop }

What is Apache Flume?

103

What is the process of creating an Ambari client?

Can you list few commonly used hive services?

615

Can you define parquet file?

261

Name some independent extensions that contribute to the Ambari codebase?

Is secondary namenode a substitute to the namenode?

626

How are sparks created?

271

What is the use of flatmap in spark?

262

What is reduce side join in mapreduce?

561

Is apache spark a tool?

252

Have you ever used Counters in Hadoop. Give us an example scenario?

1017

What is “serde” in “hive”?

629

What are the various input and output types supported by mapreduce?

566

What is the utilization of hcatalog?

645

What are the types of traditional method of message transfer?

560

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