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?

750

How Hive organize the data?

726

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?

762

Explain the Differences between Hive and Spark SQL?

719

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

706

Explain Clustering in Hive?

711

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

702

What are collection data types in Hive?

722

Can hive queries be executed from script files? How?

665

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

704

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

806

Un-Answered Questions { Hadoop }

Explain the flatMap operation on Apache Spark RDD?

318

How to perform the inter-cluster data copying work in HDFS?

What file systems does spark support?

1787

What is the bottom layer of abstraction in the Spark Streaming API ?

799

What is dag – directed acyclic graph?

300

State use cases of impala?

What is hadoop sqoop?

In Map Reduce why map write output to Local Disk instead of HDFS?

905

What problems can be addressed by using Zookeeper?

946

What is a primary key? And what are it’s different types?

Explain what is difference between an input split and hdfs block?

Define the term Column Families?

What is Row Key?

989

When should you use spark cache?

289

Does Apache Sqoop have a default database?

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