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

Discuss the various running mode of Apache Spark?

291

Describe Spark SQL?

341

Explain SparkContext in Apache Spark?

329

What are the types of Transformation in Spark RDD Operations?

286

Explain first() operation in Apache Spark RDD?

368

What are the ways in which Apache Spark handles accumulated Metadata?

353

Explain the various Transformation on Apache Spark RDD like distinct(), union(), intersection(), and subtract()?

298

Is it possible to run Apache Spark without Hadoop?

275

What is Apache Spark Streaming?

326

How can you implement machine learning in Spark?

279

List some commonly used Machine Learning Algorithm Apache Spark?

291

What is the command to start and stop the Spark in an interactive shell?

313

List out the ways of creating RDD in Apache Spark?

289

What are the various advantages of DataFrame over RDD in Apache Spark?

307

What is flatmap in apache spark?

326

Un-Answered Questions { Hadoop }

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

What is tungsten in spark?

393

What is sc textfile?

335

Explain partitions?

278

Why do we need hdfs?

Define yum?

What are the befefits of nosql over relational database?

What is Apache Flume?

108

Explain how HDFS communicates with Linux native file system?

Explain Clustering in Hive?

707

What is difference between spark and hadoop?

258

What services run after running hbase job?

168

How do you write your own SerDe?

762

how is a file of the size 1 GB uncompressed

929

Where does Spark Driver run on Yarn?

287

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