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?

439

What is a Heartbeat in Hadoop?

560

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

What is a Backup node in Hadoop?

560

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

495

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

590

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

1280

What is Balancer in Hadoop?

472

What is active and passive NameNode in Hadoop?

463

How can one check whether NameNode is working or not?

542

How would you restart NameNode?

422

How NameNode tackle Datanode failures in Hadoop?

463

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

436

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

453

What is meant by streaming access?

545

Un-Answered Questions { Big Data }

What is metastore?

633

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

407

What is the basic difference between traditional RDBMS and Hadoop?

443

What does rdd mean?

314

What happens when an action is executed in spark?

339

Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?

449

What are the basic commands in Apache Sqoop and its uses?

What is shuffle in spark?

405

What is isr?

523

How will you make changes to the default configuration files?

963

What are the different types of Znodes?

981

What do you mean by snitch?

Can you explain indexing?

414

Explain the Features of HBase?

212

What is heartbeat in hdfs?

646

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