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.

Explain cassandra.

Where cassandra stores its data?

What do you mean by cassandra-cqlsh?

What is a mapreduce algorithm?

362

What is mapreduce algorithm?

323

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?

341

Where the mapper's intermediate data will be stored?

342

Which are the methods in the mapper interface?

344

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

362

What do you mean by taskinstance?

379

Un-Answered Questions { Big Data }

List the benefits of using Cassandra.

Explain Avro Schemas?

Replication causes data redundancy then why is is pursued in HDFS?

How can you import only a subset of rows from a table?

What do you mean by replication factor?

What are the main components in Hadoop Eco-System and what are their functions ?

252

Explain the CLI In Zookeeper?

What are the filters are available in apache hbase?

106

What is RDD in Apache Spark? How are they computed in Spark? what are the various ways in which it can create?

218

What is Apache Zookeeper Meant For?

In how many ways can we use Spark over Hadoop?

201

What are the config properties of presto?

What is spark technology?

184

What is a bookkeeper client in bookkeeper?

What happen if the number of the reducer is 0 in MapReduce?

371

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