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 is sparkContext?

284

Name various types of Cluster Managers in Spark.

347

How much faster is Apache spark than Hadoop?

294

Difference between groupByKey vs reduceByKey in Apache Spark?

470

How you can use Akka with Spark?

360

Name three features of using Apache Spark

289

How to start and stop spark in interactive shell?

344

To use Spark on an existing Hadoop Cluster, do we need to install Spark on all nodes of Hadoop?

358

How will you connect Apache Spark with Apache Mesos?

267

how will you implement SQL in Spark?

379

Why is Transformation lazy in Spark?

349

Does Hoe Spark handle monitoring and logging in Standalone mode?

277

Explain foreach() operation in apache spark?

308

What are the various functions of Spark Core?

332

What is the job of blend () and repartition () in Map Reduce?

640

Un-Answered Questions { Hadoop }

If you run a select * query in hive, why does it not run mapreduce?

748

What is the History of Cassandra Database ?

Why HDFS stores data using commodity hardware despite the higher chance of failures in hadoop?

What is Ambari shell?

What is Distributed Cache?

912

What are components of ambari tjat are important for automation and integration?

What is the role zookeeper plays in a cluster of kafka?

498

What is a shuffle block in spark?

277

How to open a connection in hbase?

153

What do you understand about yarn?

285

Compare apache pig and sql?

574

What are different tombstone markers in hbase?

156

Explain values() operation in apache spark?

498

What is the difference between nas (network attached storage) and hdfs?

Whats the default port that jobtrackers listens ?

479

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