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

Big Data Interview Questions

Questions Answers Views Company eMail

Explain how input and output data format of the hadoop framework?

714

when hadoop enter in safe mode?

745

How to enable recycle bin or trash in hadoop?

706

Whats is distributed cache in hadoop?

678

what should be the ideal replication factor in hadoop?

653

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

722

How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

729

How does an hadoop application look like or their basic components?

729

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

669

What is partitioning?

465

Can we change the file cached by distributed cache

428

Why would nosql be better than using a sql database? And how much better is it?

484

Why we use intwritable instead of int? Why we use longwritable instead of long?

483

What happens if you don?t override the mapper methods and keep them as it is?

462

What are the side data distribution techniques?

479

Un-Answered Questions { Big Data }

How to enable trash/recycle bin in hadoop?

739

What will happen in case you have not issued the command?

762

Define fold() operation in Apache Spark?

306

What are the stable versions of Hadoop?

1018

What are the disadvantages of using Spark?

309

Can you define udf?

425

It can be possible that a Job has 0 reducers?

965

What happens to rdd when one of the nodes on which it is distributed goes down?

435

When we send a data to a node, do we allow settling in time, before sending another data to that node?

490

Explain the term commitlog?

What are the port numbers of namenode, job tracker and task tracker?

712

What is the difference between hadoop and spark?

273

What exactly is apache spark?

297

What is the latest version of sqoop?

Why do we need Hadoop?

521

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