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

Big Data Interview Questions

Questions Answers Views Company eMail

How to add/delete a Node to the existing cluster?

1 585

What is Mapper in Hadoop?

1 617

What is Reducer in Hadoop?

1 610

What are the most common InputFormats in Hadoop?

1 661

Explain InputSplit in Hadoop?

1 510

What is the purpose of RecordReader in hadoop?

1 532

What is Combiner in Hadoop?

1 592

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

1 520

Why aggregation cannot be done in Mapper?

1 626

Explain map-only job?

1 571

What is KeyValueTextInputFormat in Hadoop?

1 594

What happen if number of reducer is set to 0 in Hadoop?

1 540

What is TextInputFormat in Hadoop?

1 579

What is purpose of RecordWriter in Hadoop?

1 556

What are the most common OutputFormat in Hadoop?

1 593

Un-Answered Questions { Big Data }

Can We Change settings within Hive Session? If Yes, How?

836

What is the function of UNION and SPLIT operators? Give examples?

579

Can free-form SQL queries be used with Sqoop import command? If yes, then how can they be used?

When to choose "External Table" in Hive?

847

What are the different types of tables available in Hive?

745

When we are using queries instead of scripting?

778

What is the latest version of sqoop?

How job tracker schedules an assignment?

473

Explain how RDDs work with Scala in Spark

355

Give me the examples of Columnar database ?

641

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

519

State some DDL Command with brief Description?

What is the roadmap for apache mahout version 1.0?

How to skip header rows from a table in Hive?

872

How do I set up flume agent?

For More Un-Answered { Big Data } Questions Click Here