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 do you mean by Schema Declaration?

What is Apache Kafka?

511

Why is Kafka technology significant to use?

487

Explain the role of the offset?

504

What is the process for starting a Kafka server?

559

What can you do with Kafka?

508

What roles do Replicas and the ISR play?

509

What is the role of the ZooKeeper in Kafka?

499

What are the types of traditional method of message transfer?

564

Explain the role of the Kafka Producer API?

492

In the Producer, when does QueueFullException occur?

517

Why are Replications critical in Kafka?

532

What does ISR stand in Kafka environment?

620

What are consumers or users?

574

What is the main difference between Kafka and Flume?

643

Un-Answered Questions { Hadoop }

Define primary key in Apache Cassandra?

List commonly used machine learning algorithm?

287

Can MapReduce program be written in any language other than Java?

888

Why do we need Pig?

791

How can I delete the above index named index_bonuspay?

698

Why is block size large in Hadoop?

What problems have you faced when you are working on Hadoop code?

927

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

604

What happened after creating a table in hive ?

678

How many Reducers should be configured?

163

What impala use for authentication?

What are the prime features of apache zookeeper?

what Hive query processor does?

636

What do you understand by Executor Memory in a Spark application?

456

Name some companies that use Hadoop?

917

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