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 many operational commands in hbase?

164

why use hcolumndescriptor class?

146

What is the row key?

153

Tell me about the types of hbase operations?

171

How does hbase actually delete a row?

188

Name the filter which accepts the page size as the parameter in hbase?

179

Explain why to use hbase?

154

Mention the difference between hbase and relational database?

157

Mention what are the three types of tombstone markers in hbase?

219

Mention what are the key components of hbase?

166

Explain what is the row key?

146

Can the region server will be located on all datanodes?

316

What is the meaning of compaction in hbase?

156

Discuss how you can use filters in apache hbase

158

Explain jmx concerning hbse

168

Un-Answered Questions { Hadoop }

What is the difference between Cassandra, Pig and Hive?

920

What is wal and hlog in hbase?

294

What is CAP Theorem? What aspects does Hadoop support from this theorem?

432

What is a namenode? How many instances of namenode run on a hadoop cluster?

589

What does heartbeat in hdfs means?

What are the differences between Caching and Persistence method in Apache Spark?

297

What is a Record Reader in hadoop?

909

Explain InputSplit in Hadoop?

434

Does spark load all data in memory?

306

What is the difference between an input split and hdfs block?

What do you mean by ZNode?

Explain fullOuterJoin() operation in Apache Spark?

396

How to specify more than one path for storage in Hadoop?

459

What are the primary phases of a Reducer?

767

What are the types of Apache Spark transformation?

270

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