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

Big Data Interview Questions

Questions Answers Views Company eMail

What is the role of alter keyspace?

What is hadoop, hbase, hive and cassandra? Specify similarities and differences among them.

122

Explain cassandra.

Where cassandra stores its data?

What do you mean by cassandra-cqlsh?

What is a mapreduce algorithm?

586

What is mapreduce algorithm?

557

What is hdfs block size?

How hdfs is different from traditional file systems?

How is hdfs block size different from traditional file system block size?

When the reducers are are started in a mapreduce job?

558

Where the mapper's intermediate data will be stored?

593

Which are the methods in the mapper interface?

589

What is a namenode? How many instances of namenode run on a hadoop cluster?

593

What do you mean by taskinstance?

692

Un-Answered Questions { Big Data }

What are the different parts of Hive ?

703

Is hadoop a memory?

654

Describe join() operation. How is outer join supported?

270

Can we write map reduce program in other than java programming language. How?

462

Can you define big data analytics?

482

Explain the key features of Spark.

278

what are the three modes in which Hadoop can be run?

588

Is it possible to add a parameter while running a saved job?

Describe the distnct(),union(),intersection() and substract() transformation in Apache Spark RDD?

294

On What concept the Hadoop framework works?

1159

Who is intended audience to learn HCatalog?

What is the use of foreach operation in Pig scripts?

549

What are different modes of metastore deployment in Hive?

664

What is Flume event?

What are the commonalities between pig and hive?

547

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