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?

359

What happens to a NameNode that has no data?

1585

What is a Hive Metastore?

1 2046

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

1168

What is a heartbeat in HDFS?

917

What are sink processors?

910

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

988

Does hadoop always require digital data to process?

1181

what is meaning Replication factor?

950

What is the purpose of RawComparator interface?

1128

Where is the Mapper Output stored?

1374

What is the function of ApplicationMaster?

966

What problems can be addressed by using Zookeeper?

941

Can there be no Reducer?

840

What is Hadoop streaming?

1046

Un-Answered Questions { Hadoop }

What alternate way does HDFS provides to recover data in case a Namenode, without backup, fails and cannot be recovered?

How does rdd work in spark?

297

What is a flume agent?

What do you understand by Data Replication in Cassandra?

Is it possible to use Kafka without ZooKeeper?

651

List commonly used machine learning algorithm?

292

What does hadoop-metrics.properties file do?

529

Why do we perform partitioning in Hive?

748

Explain textloader function?

651

What is Small File Problem in Hadoop? How can it be resolved?

538

How many ways can you create rdd in spark?

332

What is regionserver?

179

Explain what is wal and hlog in hbase?

312

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

What is spark used for?

268

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