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?

588

Why is Kafka technology significant to use?

551

Explain the role of the offset?

567

What is the process for starting a Kafka server?

638

What can you do with Kafka?

585

What roles do Replicas and the ISR play?

590

What is the role of the ZooKeeper in Kafka?

562

What are the types of traditional method of message transfer?

622

Explain the role of the Kafka Producer API?

567

In the Producer, when does QueueFullException occur?

589

Why are Replications critical in Kafka?

609

What does ISR stand in Kafka environment?

701

What are consumers or users?

648

What is the main difference between Kafka and Flume?

737

Un-Answered Questions { Hadoop }

when do reducers play their role in a mapreduce task?

652

What is Chain Mapper?

600

What is Distributed Cache?

937

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

326

Explain the core benefits for hadoop users by using the apache ambari?

When do you have to avoid secondary indexes?

Explain what happens in textinformat ?

784

How can I import large objects (BLOB and CLOB objects) in Apache Sqoop?

How do you overwrite replication factor?

488

What is Hector in Cassandra?

104

What are the different methods to set up local repositories?

What is spark reducebykey?

289

Give some points of hive for hadoop ?

764

What is sc parallelize in spark?

315

Is it mandatory to set input and output type/format in MapReduce?

787

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