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

Big Data Interview Questions

Questions Answers Views Company eMail

What happen on the namenode when a client tries to read a data file?

461

What is replication factor?

431

If the hadoop administrator needs to make a change, which configuration file does he need to change?

442

What is distributed copy (distcp)?

481

What is the role of the secondary namenode?

441

Are there any special requirements for namenode?

425

is there a standard procedure to deploy hadoop?

423

What happen if a datanode loses network connection for a few minutes?

589

What is the procedure for namenode recovery?

454

How would an hadoop administrator deploy various components of hadoop in production?

422

What happen if one of the datanodes has much slower cpu?

431

After increasing the replication level, I still see that data is under replicated. What could be wrong?

459

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

445

What is the difference between a hadoop database and relational database?

453

Can we deploye job tracker other than name node?

659

Un-Answered Questions { Big Data }

Explain how cassandra delete data?

Define durable writes?

What is sharding in big data?

499

Is hadoop a memory?

701

Is fs.mapr.working.dir a single directory?

683

What exactly is spark?

272

What are some of the interesting facts about Big Data?

631

What is the benefit of kafka?

508

When to use coalesce and repartition in spark?

319

What relational operators can we use that are related to combining and splitting in Pig language?

553

Is it possible to change the default location of a managed table?

729

What are the key features of any nosql database?

What are the main components in Hadoop Eco-System and what are their functions ?

493

What is the local repository and where it is useful while using ambari environment?

Is there another way to check whether Namenode is working?

403

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