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 do we mean by Partitions or slices?

297

How can you store the data in spark?

332

What are the advantages of DataFrame?

324

What are the components of Spark Ecosystem?

319

How is data represented in Spark?

326

What is the difference between Spark Transform in DStream and map ?

305

Explain various level of persistence in Apache Spark?

316

What are benefits of DataFrame in Spark?

345

What are the various programming languages supported by Spark?

371

What is accumulator?

346

Explain different transformation on DStream?

288

What are Paired RDD?

331

Name some sources from where Spark streaming component can process real-time data?

307

What is meant by in-memory processing in Spark?

323

Explain what are the various types of Transformation on DStream?

290

Un-Answered Questions { Hadoop }

What are the key points of data model of Cassandra?

What are the benefits of lazy evaluation?

317

What is spark tool in big data?

288

What are channel selectors?

1086

Does Apache Sqoop have a default database?

For a Hadoop job, how will you write a custom partitioner?

717

Explain accumulators in apache spark.

2095

What is data skew and how do you fix it?

342

MapReduce Types and Formats and Setting up a Hadoop Cluster?

969

Can hbase run without hadoop?

793

What is a task instance in hadoop? Where does it run?

659

What do you know about Partition in Kafka?

702

Does spark use mapreduce?

304

What is kafka technology?

559

Can you explain about the indexing process in hdfs?

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