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

Big Data Interview Questions

Questions Answers Views Company eMail

Why is Data Block size set to 128 MB in Hadoop?

1 482

What is a Heartbeat in Hadoop?

1 625

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

1 565

What is a Backup node in Hadoop?

1 618

What do you mean by the NameNode High Availability in hadoop?

1 553

What is the default replication factor in Hadoop and how will you change it?

1 656

Why Hadoop performs replication, although it results in data redundancy?

1 1332

What is Balancer in Hadoop?

1 548

What is active and passive NameNode in Hadoop?

1 518

How can one check whether NameNode is working or not?

1 597

How would you restart NameNode?

1 470

How NameNode tackle Datanode failures in Hadoop?

1 524

Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

1 493

If DataNode increases, then do we need to upgrade NameNode in Hadoop?

1 517

What is meant by streaming access?

1 600

Un-Answered Questions { Big Data }

When to choose "External Table" in Hive?

847

What is the stable version of Hive ?

2673

What is a Hive variable? What for we use it?

854

State some DDL Command with brief Description?

What is the latest version of spark?

288

How can I delete the above index named index_bonuspay?

777

Give me the examples of Columnar database ?

641

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1059

What is the latest version of ambari that is available in the present market?

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

519

What is the latest version of sqoop?

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

When we are using queries instead of scripting?

778

How to set property in apache tajo?

What is meant by Transformation? Give some examples.

328

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