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

Can we run unix shell commands from the hive? Give example?

749

How Hive organize the data?

714

Mention what are views in Hive?

694

What are the default record and field delimiter used for hive text files?

813

How can you delete the DBPROPERTY in Hive?

638

How do you check if a particular partition exists?

692

Can a partition be archived? What are the advantages and Disadvantages?

757

Explain the Differences between Hive and Spark SQL?

719

Can we change the data type of a column in a hive table?

703

Explain Clustering in Hive?

710

What does the “USE” command in the hive do?

696

What are collection data types in Hive?

721

Can hive queries be executed from script files? How?

663

Give examples of the SerDe classes which hive uses to Serialize and Deserialize data?

702

Is it possible to use the same metastore by multiple users, in case of the embedded hive?

805

Un-Answered Questions { Hadoop }

What are the advantages of using mapreduce with hadoop?

590

Wherever (Different Directory) I run the hive query, it creates new metastore_db, please explain the reason for it?

747

Explain MemStore?

176

What are the various configuration parameters required to run a mapreduce job?

660

How is the splitting of file invoked in Hadoop ?

536

How to configure hadoop to reuse JVM for mappers?

1202

Define standalone mode in hbase?

140

What daemons run on master nodes?

490

Explain the features of stand alone (local) mode?

620

Define data cleansing?

404

What are the port numbers of namenode?

425

Define Nodetool Utility?

What is the logistic regression?

438

what is composite type in cassandra?

What are Actions? Give some examples.

316

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