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

Big Data Interview Questions

Questions Answers Views Company eMail

Which company initially developed Hive ?

1 2501

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1148

What are the components of Hive architecture?

1158

What is HDFS Federation?

1031

What are watches?

1073

Explain the Job OutputFormat?

1005

Virtual Box & Ubuntu Installation?

1053

What is the difference between HDFS and NAS ?

1423

How Mapper is instantiated in a running job?

1039

Where do you specify the Mapper Implementation?

1061

What is the meaning of speculative execution in Hadoop? Why is it important?

1094

What is the InputFormat ?

1067

Command to format the NameNode?

990

Who is a 'user' in HDFS?

943

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1361

Un-Answered Questions { Big Data }

Explain Machine Learning library in Spark?

303

Explain what is wal and hlog in hbase?

320

What is a pipelinedrdd?

450

In which scenario Pig is better fit than MapReduce?

879

How can data transfer be minimized when working with Apache Spark?

311

What is the reason for creating a new metastore_db whenever Hive query is run from a different directory?

1038

name few other popular column oriented databases like hbase.

208

Explain some Disadvantages of Avro?

What is secondary namenode?

Where can I get sample data to try?

How is indexing done in HDFS?

What are the core components of Hadoop?

568

What is a hive in big data?

711

If map reduce is inferior to spark then is there any benefit of learning it?

302

What does a Spark Engine do?

339

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