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 transformation in spark?

328

Can you explain spark sql?

322

What are the main components of spark?’

323

Can you explain spark streaming?

307

How rdd persist the data?

297

Can you explain accumulators in apache spark?

315

What are common spark ecosystems?

324

What are features of apache spark?

326

Explain how can apache spark be used alongside hadoop?

258

What are the types of cluster managers in spark?

282

Can you define pagerank?

289

Can you explain spark core?

266

Explain about mappartitions() and mappartitionswithindex()

326

Explain how can you minimize data transfers when working with spark?

436

Explain how can spark be connected to apache mesos?

289

Un-Answered Questions { Hadoop }

What happen when namenode enters in safemode in hadoop?

436

What is the latest version of spark?

271

What are the port numbers of namenode, job tracker and task tracker?

723

What is graph db?

Define parquet file format? How to convert data to parquet format?

324

Can Ambari manage multiple clusters?

How can Flume be used with HBase?

117

What does a split do?

629

Replication causes data redundancy then why is pursued in hdfs?

What are the different modes in which PIG can run and explain those?

497

Why should we use ‘distinct’ keyword in Pig scripts?

544

What is Apache Hadoop YARN?

1465

What are problems with small files and hdfs?

How do you organize the pig latin statements?

600

Explain the maximum size of a message that can be received by the Kafka?

734

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