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?

340

Explain SparkContext in Apache Spark?

329

What are the types of Transformation in Spark RDD Operations?

286

Explain first() operation in Apache Spark RDD?

367

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?

325

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 }

What does the mapred.job.tracker command do?

425

What is impala data types?

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

708

What is the Use of Cassandra Database ?

Can you explain commodity hardware?

406

what is the meaning of broker in Kafka?

541

In which scenario Pig is better fit than MapReduce?

835

What does the high availability of a name-node means? How is it accomplished?

413

Can we say cogroup is a group of more than 1 data set?

724

What are the core apis in kafka?

594

What are the different Relational Operators available in pig language?

732

What are the different components of Cassandra?

107

How to create Users in hadoop HDFS?

how indexing in HDFS is done?

853

Explain about hlog and wal in hbase.

305

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