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?

305

What is use of tools command?

200

Explain about hlog and wal in hbase.

312

Compare hbase & cassandra?

167

Define standalone mode in hbase?

147

Explain how does hbase actually delete a row?

171

What is the reason of using hbase?

194

Which command is used to run hbase shell?

176

Define the difference between hive and hbase?

172

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

335

Why hbase is a schema-less database?

184

What is the use of ycsb?

179

what are the key components of hbase?

177

name few other popular column oriented databases like hbase.

208

What is hfile ?

298

Un-Answered Questions { Hadoop }

What is the main purpose of HDFS fsck command?

1852

How to show up details in pig ?

631

What are accumulators in spark?

326

Can I set the number of reducers to zero?

434

What are the most common OutputFormat in Hadoop?

583

What are the various levels of persistence in Apache Spark?

326

What main configuration parameters are specified in mapreduce?

722

What do you mean by Persistence?

330

Is JDBC driver enough to connect sqoop to the databases?

What is a Secondary Namenode? Is it a substitute to the Namenode?

1067

When is it not recommended to use MapReduce paradigm for large

696

Specify Cassandra’s importance on Facebook?

155

Can You Use Apache Spark To Analyze and Access Data Stored In Cassandra Databases?

314

What are the different Eval functions available in Pig?

599

Define Thrift in Apache Cassandra?

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