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 is decorating filters?

301

What is use of tools command?

194

Explain about hlog and wal in hbase.

305

Compare hbase & cassandra?

160

Define standalone mode in hbase?

140

Explain how does hbase actually delete a row?

166

What is the reason of using hbase?

187

Which command is used to run hbase shell?

174

Define the difference between hive and hbase?

170

Which one would you recommend for hbase table design approach – tall-narrow or flat wide?

329

Why hbase is a schema-less database?

184

What is the use of ycsb?

173

what are the key components of hbase?

173

name few other popular column oriented databases like hbase.

203

What is hfile ?

291

Un-Answered Questions { Hadoop }

Why do the nodes are removed and added frequently in a hadoop cluster?

475

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

637

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

Why is spark good?

293

Which type of data HBase can store?

154

When to choose "External Table" in Hive?

811

What is a Combiner?

750

How does spark work with python?

298

How to compress mapper output in Hadoop?

681

Can you explain logistic regression?

419

What load do concurrent queries produce on the namenode?

What is a Column family in hbase?

196

Define Thrift in Apache Cassandra?

What do you mean by inputformat?

622

What is the best practice to deploy the secondary name node?

459

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