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?

359

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

424

What advantages does Spark offer over Hadoop MapReduce?

317

Why is Spark RDD immutable?

383

What are the types of Apache Spark transformation?

304

What is Spark Core?

321

Why Apache Spark?

335

Explain transformation and action in RDD in Apache Spark?

307

How can we create RDD in Apache Spark?

316

What is SparkSession in Apache Spark?

307

What is the Difference SparkSession vs SparkContext in Apache Spark?

431

What are the abstractions of Apache Spark?

317

What is SparkContext in Apache Spark?

331

What are the components of Apache Spark Ecosystem?

413

Explain the RDD properties?

332

Un-Answered Questions { Hadoop }

Can you modify the file present in hdfs?

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

608

What is jmx connector?

Why do we need spark?

294

What is a Consumer Group?

660

What is the task of Spark Engine

341

What are the consistency levels for write operations in Cassandra?

101

What exactly is hadoop?

730

Can you execute Hadoop dfs Commands from Hive CLI? How?

1203

What are the core methods of a Reducer?

555

What happens when two users try to access to the same file in HDFS?

Explain how Hive Deserialize and serialize the data?

787

What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

1146

How can you import only a subset of rows from a table?

How will you implement joins in HBase?

180

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