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

Explain the hadoop-core configuration?

700

Explain the benefits of block transfer?

837

Define a task tracker?

650

Define a metadata?

660

Define a daemon?

675

Explain the core components of hadoop?

668

Define streaming?

665

What is keyvaluetextinputformat?

741

Define a commodity hardware? Does commodity hardware include ram?

752

Explain the hadoop configuration files at present?

673

Explain the difference between gen1 and gen2 hadoop with regards to the namenode?

740

Explain why the name ‘hadoop’?

719

Define a combiner?

659

Explain the master class and the output class do?

661

Explain the features of stand alone (local) mode?

638

Un-Answered Questions { Hadoop }

What is a spill factor with respect to the ram?

886

Can you overwrite Hadoop MapReduce configuration in Hive?

918

What is the biggest shortcoming of Spark?

319

Explain the differences between a combiner and reducer

671

What do you mean by the high availability of a namenode? How is it achieved?

Name different types of primary keys in Cassandra?

In Hadoop what is InputSplit?

640

Define a daemon?

675

What is a nosql database?

On what basis name node distribute blocks across the data nodes?

1070

What is identity mapper and identity reducer?

649

What is heartbeat in hadoop?

433

Is Pig script case sensitive?

615

Explain how indexing in hdfs is done?

What is apache hcatalog?

734

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