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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

723

Is it necessary to know java to learn hadoop?

613

Explain the use of .mecia class?

743

What is the sequencefileinputformat in hadoop?

675

What is the difference between hadoop and other data processing tools?

644

Which data storage components are used by hadoop?

631

Give the use of the bootstrap panel.

643

What are the functionalities of jobtracker?

639

Is it possible to provide multiple inputs to hadoop? If yes, explain.

619

What are the network requirements for using hadoop?

645

What is the relation between job and task in hadoop?

594

What do you know by storage and compute node?

647

What is the purpose of button groups?

697

Name the various types of lists supported by bootstrap.

620

How many instances of a jobtracker run on hadoop cluster?

599

Un-Answered Questions { Hadoop }

What is apache hcatalog?

681

Describe coalesce() operation. When can you coalesce to a larger number of partitions? Explain.

310

Define a udf?

382

What is the difference between persist

341

What are the actions followed by hadoop?

433

Explain the term sstables?

When should you use spark cache?

269

What is flume and sqoop?

105

Explain various cluster manager in Apache Spark?

367

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

1281

What is partitioning key?

508

Compare Apache Hadoop and Apache Spark?

411

is HQL case sensitive?

808

What is the purpose of Hive Driver?

1008

What is the use of explode in Hive?

667

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