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?

303

Name various types of Cluster Managers in Spark.

352

How much faster is Apache spark than Hadoop?

307

Difference between groupByKey vs reduceByKey in Apache Spark?

483

How you can use Akka with Spark?

376

Name three features of using Apache Spark

300

How to start and stop spark in interactive shell?

362

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

370

How will you connect Apache Spark with Apache Mesos?

284

how will you implement SQL in Spark?

395

Why is Transformation lazy in Spark?

362

Does Hoe Spark handle monitoring and logging in Standalone mode?

288

Explain foreach() operation in apache spark?

319

What are the various functions of Spark Core?

348

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

684

Un-Answered Questions { Hadoop }

Why is jconsole used? What is it’s different elements?

If datanodes increase, then do we need to upgrade namenode?

515

What is the man difference between hbase and hive?

722

Is kafka part of hadoop?

557

What is the user of sparkContext?

329

How can we see only top 15 records from the student.txt out of100 records in the HDFS directory?

618

Is spark a programming language?

308

What is Apache Spark Machine learning library?

335

Does 'ILLUSTRATE' run a MapReduce job?

568

What is a Speculative Execution in Hadoop MapReduce?

702

What is the use of hbase hmaster?

151

What is the heartbeat used for?

1085

How to Delete file from HDFS?

What is SuperColumn in Cassandra?

111

In which directory hadoop is installed?

451

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