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?

143

Explain the various table design approaches in HBase?

138

What is table in hbase?

204

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

205

Which type of data HBase can store?

154

How to delete the table with the HBase shell?

143

What services run after running hbase job?

168

What is the use of truncate command?

188

Explain MemStore?

176

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

168

Which command do we use to run HBase Shell?

197

Define compaction in HBase?

168

Difference between hbase and rdbms?

176

What do you understand by compaction?

158

Does HBase support SQL like syntax?

153

Un-Answered Questions { Hadoop }

Explain the difference between Spark SQL and Hive.

390

Explain plucktuple?

576

What platform and java version are required to run hadoop?

694

Explain the role of Streams API?

542

What does /etc /init.d do?

700

How is streaming implemented in spark?

1847

Why can aggregation not be done in Mapper in MapReduce?

609

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

677

Explain schemardd?

359

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

451

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

630

Can NameNode and DataNode be a commodity hardware?

1679

Explain the core methods of the reducer?

511

Can we change the file cached by distributed cache

428

How apache spark works?

294

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