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 }

What is the difference between a node, a cluster, and data centre?

247

what do you mean by compaction?

What is Yum?

Compare HBase vs RDBMS?

155

Compare RDBMS with Hadoop MapReduce.

592

Explain the lookup() operation in Spark?

217

Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?

413

What are the disadvantages of using Spark?

285

What happens if the block in HDFS is corrupted?

How does spark rdd work?

302

Define RDD?

308

Explain Dsstream with reference to Apache Spark

371

Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?

1177

How do I download apache mahout?

What do you understand by Executor Memory in a Spark application?

455

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