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 check pointing in hadoop?

441

What does secondary name-node means?

427

What type of data hadoop can handle ?

425

What does the high availability of a name-node means?

427

What does block mean?

438

What do you think about the speculative execution?

436

What did mean by data-node?

427

How to use combiner in hadoop ?

445

List few benefits of spark over map reduce?

293

Can you define rdd?

307

Do you know the comparative differences between apache spark and hadoop?

276

What do you understand about yarn?

285

Name few companies that are the uses of apache spark?

301

Name the operations supported by rdd?

329

Name the languages which are supported by apache spark and which one is most popular?

279

Un-Answered Questions { Hadoop }

How data or file is written into Hadoop HDFS?

Can you explain broadcast variables?

295

How to change a number of mappers running on a slave in MapReduce?

789

Explain how jobtracker schedules a task?

465

Can you explain spark rdd?

292

What is impala data types?

Mention what is the difference between Hbase and Hive?

692

What does impala do for fast access?

What do shuffling do?

671

Explain foreach() operation in apache spark?

308

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

645

Does spark use zookeeper?

275

Explain Zookeeper Queues?

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

What are apache tajo sql functions?

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