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?

547

Why is Kafka technology significant to use?

511

Explain the role of the offset?

537

What is the process for starting a Kafka server?

592

What can you do with Kafka?

542

What roles do Replicas and the ISR play?

546

What is the role of the ZooKeeper in Kafka?

527

What are the types of traditional method of message transfer?

593

Explain the role of the Kafka Producer API?

520

In the Producer, when does QueueFullException occur?

552

Why are Replications critical in Kafka?

571

What does ISR stand in Kafka environment?

658

What are consumers or users?

615

What is the main difference between Kafka and Flume?

690

Un-Answered Questions { Hadoop }

Compare Pig vs Hive vs Hadoop MapReduce?

675

How can you add the arbitrary key-value pairs in your mapper?

1423

Name the operations supported by rdd?

329

On what all basis can you differentiate rdd, dataframe, and dataset?

302

How spark is used in hadoop?

287

What are the different operational commands in HBase at record level and table level?

361

What makes Apache Spark good at low-latency workloads like graph processing and machine learning?

328

How to write a Custom Key Class?

939

What are the machine learning algorithms supports in apache mahout?

115

What is the unit of data that flows through a flume agent?

374

Explain caching in spark streaming.

304

What Mapper does?

984

Compare Hadoop and Spark?

322

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

731

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

287

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