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?

482

What is a Heartbeat in Hadoop?

622

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

563

What is a Backup node in Hadoop?

618

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

551

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

656

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

1330

What is Balancer in Hadoop?

546

What is active and passive NameNode in Hadoop?

513

How can one check whether NameNode is working or not?

593

How would you restart NameNode?

466

How NameNode tackle Datanode failures in Hadoop?

523

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

492

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

514

What is meant by streaming access?

599

Un-Answered Questions { Big Data }

What is nagios is used in ambari?

109

Which one is default?

543

Is it possible to add 100 more nodes when we already have 100 nodes in Hive?

1331

To use Spark on an existing Hadoop Cluster, do we need to install Spark on all nodes of Hadoop?

370

when to choose “internal table” and “external table” in hive?

733

How to managed create a table in hive ?

772

What is a skewed join?

649

What is the difference between local and remote metastore?

1151

What do you know about keyvaluetextinputformat?

649

Why can aggregation not be done in Mapper in MapReduce?

659

Can Hadoop be compared to NOSQL database like Cassandra?

966

What are the default configuration files that are used in hadoop?

740

What do you understand by cql?

Explain cap theorem?

107

What is the advantage of using –password-file rather than -P option while preventing the display of password in the sqoop import statement?

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