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?

454

What is meant by streaming access?

546

Un-Answered Questions { Big Data }

Explain the hdfs architecture?

Differentiate between GROUP and COGROUP operators?

629

Explain how you can improve the throughput of a remote consumer?

548

what is partitions in hive?

684

Explain the benefits of block transfer?

823

Does Apache Spark provide check pointing?

402

What is the purpose of DataNode block scanner?

966

Can NameNode and DataNode be a commodity hardware?

1679

What is a map side join?

685

What is an rdd?

310

Name all HCatalog Features?

What is a spark context?

274

What is anti-entropy and how is it associated with merkel tree?

What is the process of creating ambari client?

Mention how many operational commands in hbase?

288

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