Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

Mention key components of Hive Architecture?

851

what Hive query processor does?

668

What does the following query do? Insert overwrite table employees partition (country, state) select ..., Se.cnty, se.st from staged_employees se;

921

While loading data into a hive table using the load data clause, how do you specify it is a hdfs file and not a local file ?

734

What is a table generating function on hive?

714

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

697

When to use Hive?

701

Explain what is Hive?

708

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

839

What happened after creating a table in hive ?

731

What is a generic udf in hive?

734

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

911

What is the need for custom serde?

735

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

678

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

736

Un-Answered Questions { Big Data }

How many Reducers should be configured?

180

Define cell in HBase?

166

For a job in Hadoop, is it possible to change the number of mappers to be created?

786

What is Flume?

112

Explain NameNode and DataNode in HDFS?

Explain the LOAD keyword in Pig script?

627

How does reducebykey work in spark?

255

Explain how does hbase actually delete a row?

166

What is FlumeNG?

Can I do trforms or add new functionality?

Where does Spark Driver run on Yarn?

288

When to use secondary indexes?

Name different types of primary keys in Cassandra?

What do you understand by Kundera?

What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

489

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