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

Which all languages Apache Spark supports?

345

explain the concept of RDD (Resilient Distributed Dataset). Also, state how you can create RDDs in Apache Spark.

411

What advantages does Spark offer over Hadoop MapReduce?

297

Why is Spark RDD immutable?

370

What are the types of Apache Spark transformation?

288

What is Spark Core?

291

Why Apache Spark?

319

Explain transformation and action in RDD in Apache Spark?

297

How can we create RDD in Apache Spark?

301

What is SparkSession in Apache Spark?

290

What is the Difference SparkSession vs SparkContext in Apache Spark?

417

What are the abstractions of Apache Spark?

307

What is SparkContext in Apache Spark?

309

What are the components of Apache Spark Ecosystem?

403

Explain the RDD properties?

311

Un-Answered Questions { Hadoop }

What does the file hadoop-metrics.properties do?

486

What is presto verifier?

What is keyspace in Cassandra?

Differentiate between the physical plan and logical plan in Pig script?

770

How to start zookeeper server?

What are the different components of a Hive architecture?

837

What is CQL?

What do you mean by metadata in Hadoop?

Write a short note on the disadvantages of mapreduce

600

How tasks are created in spark?

290

What is a row in cassandra?

Why do we need Hadoop Archives? How is it created?

563

How many operational commands in hbase?

167

Explain how cassandra writes data?

What is the difference between a MapReduce InputSplit and HDFS block?

752

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