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

As part of optimizing the queries in hive, what should be the order of table size in a join query?

733

When to use Hive?

760

Explain what is Hive?

766

What types of costs are associated in creating index on hive tables?

878

What happened after creating a table in hive ?

770

What is a generic udf in hive?

772

Does the archiving of hive tables give any space saving in hdfs?

961

What is the need for custom serde?

763

What are the three different modes in which hive can be run?

733

What is the usefulness of the distributed by clause in hive?

777

what is ODBC and JDBC connectivity in Hive?

724

How to load data into table created in hive ?

736

Is it possible to create cartesian join between 2 tables, using hive?

726

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

725

What are the 2 types of table in hive?

723

Un-Answered Questions { Hadoop }

How do you write comments in pig scripts?

587

What do you understand by Executor Memory in a Spark application?

483

What are the main features of SPM in Cassandra?

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

691

What apache spark is used for?

262

What is purpose of RecordWriter in Hadoop?

542

What is rdd in spark with example?

296

What are the most commonly defined input formats in Hadoop?

1101

What are common spark ecosystems?

337

The partition of hive table has been modified to point to a new directory location. Do I have to move the data to the new location or the data will be moved automatically to the new location?

1065

What happens when two clients try to access the same file on HDFS?

195

How are large objects handled in Sqoop?

Explain what is the function of mapreduce partitioner?

677

Is kafka big data?

513

What is ObjectInspector functionality?

861

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