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 will you consume CSV file into the Hive warehouse using built SerDe?

765

What is the difference between Hiveserver1 and Hiveserver2?

750

How to Rename a table in Hive

708

What are the advantages and Disadvantages in archieving partition in Hive?

709

When to choose "External Table" in Hive?

759

How to skip header rows from a table in Hive?

768

Where does the data of a Hive table gets stored?

637

Can We Change settings within Hive Session? If Yes, How?

723

What are the different types of tables available in Hive?

656

When we are using queries instead of scripting?

697

When to use explode in Hive?

706

How can I delete the above index named index_bonuspay?

698

What is a Hive variable? What for we use it?

760

What are the components of a Hive query processor?

690

What is CTE Table in Hive?

713

Un-Answered Questions { Hadoop }

Is the following approach correct? Is the sqrt Of Sum Of Sq a valid reducer?

442

Can Hadoop be compared to NOSQL database like Cassandra?

863

Compare MapReduce and Spark?

272

how JobTracker schedules a task ?

804

What are the various components in kafka.

519

What are the common mistakes developers make when running Spark applications?

274

Define standalone mode in hbase?

140

What is decorating filters?

293

Define compaction in HBase?

164

If you omit the overwrite clause while creating a hive table,what happens to file which are new and files which already exist?

718

What is a combiner and where you should use it?

632

how Cassandra writes data?

what daemons run on a master node and slave nodes?

664

Explain how do ‘map’ and ‘reduce’ work?

581

Explain the operations of Apache Spark RDD?

264

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