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 a combiner in hadoop?

553

Have you ever used counters in hadoop?

461

What are some typical functions of job tracker in hadoop?

480

Can you define inputsplit in hadoop?

523

What daemons run on master nodes?

520

Can you explain rack awareness?

479

Can you explain record reader?

473

What are the side effects of not running a secondary name node?

488

What are the main components of hadoop?

485

What do you understand by unit and ()in scala?

539

Can you define udf?

480

What is the difference between an inputsplit and a block?

684

What is the purpose of context object?

467

Can you explain sequence file in hadoop?

453

What is the use of recordreader in hadoop?

462

Un-Answered Questions { Hadoop }

What is spark tool in big data?

288

What are the features of RDD, that makes RDD an important abstraction of Spark?

301

Explain keys() operation in Apache spark?

350

What is spark table?

278

Can you define udf?

480

Can you tell us more about ssh?

762

What do you understand by Commit log in Cassandra?

What are the components of Apache Spark Ecosystem?

413

How to use Apache Zookeeper command line interface?

1205

What is the advantage of using –password-file rather than -P option while preventing the display of password in the sqoop import statement?

What is the use of combiners in the hadoop framework?

652

Explain the difference between mapreduce engine and hdfs cluster?

150

What is lambda in spark?

321

What are the components of Hive architecture?

1158

What are the main features of hdfssite.xml?

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