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 do you understand by Filters in HBase?

137

Explain the various table design approaches in HBase?

134

What is table in hbase?

199

Which method is used to access HFile directly without using HBase?

201

Which type of data HBase can store?

150

How to delete the table with the HBase shell?

137

What services run after running hbase job?

164

What is the use of truncate command?

180

Explain MemStore?

170

What is the best practice on deciding the number of column families for HBase table?

163

Which command do we use to run HBase Shell?

192

Define compaction in HBase?

162

Difference between hbase and rdbms?

169

What do you understand by compaction?

153

Does HBase support SQL like syntax?

149

Un-Answered Questions { Hadoop }

How can I improve my spark performance?

263

What are the side data distribution techniques?

443

What is the default block size in hdfs?

985

How will you read and write HDFS files in Hive?

655

What does reduce action do?

257

Specify some uses of HBase?

182

What is the key- value pair in Hadoop MapReduce?

634

what is the traditional method of message trfer?

524

What do you understand by column family?

Which java class handles the output record encoding into files which result from Hive queries?

632

What is the purpose of retention period in Kafka cluster?

623

how is a file of the size 1 GB uncompressed

872

How one can change Replication factor when Data is already stored in HDFS

Can we have multiple entries in the master files?

652

Are spark dataframes distributed?

296

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