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 data cleansing?

491

What is the number of default partitioner in hadoop?

480

Can you explain hadoop streaming?

455

List out some common problems faced by data analyst?

494

What is job tracker role in hadoop?

528

What do you understand by a closure in scala?

525

Can you explain textinformat?

542

List some use cases where classification machine learning algorithms can be used.

501

How many daemon processes run on a hadoop cluster?

499

Which scala library is used for functional programming?

499

Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?

520

Which operating system(s) are supported for production hadoop deployment?

469

Can you explain speculative execution?

454

How do you overwrite replication factor?

495

Can you explain logistic regression?

467

Un-Answered Questions { Hadoop }

What are the various input and output types supported by mapreduce?

687

What are the features of apache spark?

308

What is the latest version of ambari that is available in the present market?

Explain the operations of Apache Spark RDD?

302

Explain HCatalog Create Table CLI along with its syntax?

Explain join() operation in Apache Spark?

366

How can you native libraries be included in yarn jobs?

478

What is dag spark?

345

What are the complicated steps in Flume configurations?

146

When to choose "External Table" in Hive?

842

What is difference between memory channel and file channel in flume?

What are the different Eval functions available in Pig?

600

Explain briefly what is Action in Apache Spark? How is final result generated using an action?

326

What are the different types of tables available in Hive?

741

Explain Spark coalesce() operation?

306

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