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?

744

How to enable recycle bin or trash in hadoop?

706

Whats is distributed cache in hadoop?

676

what should be the ideal replication factor in hadoop?

650

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?

727

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

725

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

667

What is partitioning?

462

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?

475

Un-Answered Questions { Big Data }

Use of create-hive-table command in hadoop sqoop?

How does hdfs give great throughput?

How does reducebykey work in spark?

255

What is the syntax of describe Command?

304

How can client interact with Hive?

698

Explain what is a difference between an input split and hdfs block?

Explain the difference between an hdfs block and input split?

How can you minimize data transfers when working with Spark?

347

Is it necessary to install spark on all the nodes of a YARN cluster while running Apache Spark on YARN ?

344

How do I install spark?

273

Define the use of Source Command in Cassandra?

What is Client API?

281

What are the benefits of Spark over MapReduce?

640

What is Federation?

415

What is the difference between Pig and SQL?

634

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