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?

171

why use hcolumndescriptor class?

153

What is the row key?

161

Tell me about the types of hbase operations?

179

How does hbase actually delete a row?

203

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

190

Explain why to use hbase?

166

Mention the difference between hbase and relational database?

172

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

227

Mention what are the key components of hbase?

181

Explain what is the row key?

153

Can the region server will be located on all datanodes?

322

What is the meaning of compaction in hbase?

169

Discuss how you can use filters in apache hbase

164

Explain jmx concerning hbse

181

Un-Answered Questions { Hadoop }

Define various running modes of apache spark?

305

What will be the output of cast ('XYZ' as INT)?

721

What did mean by data-node?

470

Explain about the partitioning, shuffle and sort phase in MapReduce?

867

What are the characteristics of hadoop framework?

697

How often DataNode send heartbeat to NameNode in Hadoop?

577

Why do we need buckets?

765

What is application master in spark?

294

What is Starvation scenario in spark streaming?

358

What does map transformation do? Provide an example.

332

What is SerDe in Apache Hive ?

971

How to change replication factor of files already stored in HDFS?

1035

When to use Avro, explain?

Is it possible to leverage real time analysis on the big data collected by flume directly? If yes, then explain how?

What is flume and kafka?

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