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 keys() operation in Apache spark?

336

What are the roles and responsibilities of worker nodes in the Apache Spark cluster? Is Worker Node in Spark is same as Slave Node?

357

Explain sum(), max(), min() operation in Apache Spark?

301

Explain cogroup() operation in Spark?

289

What is Map() operation in Apache Spark?

364

Explain Spark saveAsTextFile() operation?

342

Define paired RDD in Apache Spark?

279

Explain different transformations in DStream in Apache Spark Streaming?

330

Explain pipe() operation in Apache Spark?

311

What are the ways to create RDDs in Apache Spark? Explain.

308

Explain Spark Core?

303

Explain the flatMap operation on Apache Spark RDD?

318

Can we run Apache Spark without Hadoop?

306

What is DStream in Apache Spark Streaming?

319

Define Partition and Partitioner in Apache Spark?

307

Un-Answered Questions { Hadoop }

Tell me two most commonly used commands in HDFS?

Explain apache kafka?

522

If DataNode increases, then do we need to upgrade NameNode in Hadoop?

455

How can we create table by using command?

How to show up details in pig ?

597

What is executor memory and driver memory in spark?

286

Mention when you can use alter keyspace?

Explain the concept of Leader and Follower?

606

Is Apache Kafka is a distributed streaming platform? if yes, what you can do with it?

631

When do you call the cleanup method?

528

What happens to a namenode, when job tracker is down?

753

Mention the difference between hbase and relational database?

162

What is Your Cluster size ?

1439

Explain what is composite type in cassandra?

What exactly is spark?

272

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