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?

805

what Hive query processor does?

635

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

876

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 ?

687

What is a table generating function on hive?

676

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

669

When to use Hive?

667

Explain what is Hive?

673

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

788

What happened after creating a table in hive ?

673

What is a generic udf in hive?

691

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

863

What is the need for custom serde?

684

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

640

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

694

Un-Answered Questions { Big Data }

LOWER or LCASE function in Hive with example?

662

What is Hadoop Custom partitioner ?

950

Explain about the different channel types in Flume. Which channel type is faster?

168

Define Thrift in Apache Cassandra?

Who are Intended Audience to learn Avro?

How is streaming implemented in spark?

1828

Explain Catalyst framework?

337

What is Identity reducer?

473

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

Define partitioning key?

457

How to control access to data in impala?

What are the different tasks we can perform managing host using ambari host tab?

Is spark built on top of hadoop?

294

Explain the common input formats in hadoop?

434

Name some best features of Ambari?

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