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

Is it possible to iterate through the rows of HBase table in reverse order?

214

What is the use of HColumnDescriptor class?

192

Define catalog tables in HBase?

215

Which command is available to show the current HBase user?

161

How will you backup an HBase cluster?

144

What is the use of MasterServer?

174

Explain HBase Architecture in brief?

200

Explian the Advantages of HBase?

187

Compare HBase vs RDBMS?

157

Explain HBase Meta Table?

175

How many types of HBase Operations are there?

169

Define cell in HBase?

166

How to start hbase services?

212

Which code do we use to open the connection in Hbase?

189

What is the use of ZooKeeper?

228

Un-Answered Questions { Hadoop }

What is a generic udf in hive?

734

How does Cassandra perform write function?

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

What happens when we submit a spark job?

314

Explain what is logging in Cassandra?

What happens if the block on Hadoop HDFS is corrupted?

Name the most common Input Formats defined in Hadoop? Which one is default?

464

What happens to zk sessions while the cluster is down?

What are the different data formats supported by apache tajo?

What is Small File Problem in Hadoop? How can it be resolved?

538

Whether the output of mapper or output of partitioner written on local disk?

672

Where is the output of Mapper written in Hadoop?

772

How is RDD in Spark different from Distributed Storage Management?

380

What is Yum?

What is the difference between Spark Transform in DStream and map ?

298

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