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

Why do the nodes are removed and added frequently in a hadoop cluster?

476

What is a namenode?

407

Can hadoop handle streaming data?

467

What is hadoop? Name the main components of a hadoop application?

448

What do you know about yarn?

418

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

450

What is the purpose of exploding in hive?

680

Can you list few commonly used hive services?

665

What is the difference between piglatin and hiveql?

664

How can you transfer data from hive to hdfs?

718

What is the difference between sort by and order by in hive?

691

How can you connect an application, if you run hive as a server?

723

Can you explain smb join in hive?

740

Can you define serde in hive?

685

Can you explain sqoop metastore?

Un-Answered Questions { Hadoop }

How do you run pig scripts on kerberos secured cluster?

551

What does ambari shell can provide?

What do you know about sequencefileinputformat?

638

Is spark built on top of hadoop?

318

What is the use of ycsb?

173

Explain Accumulator in Spark?

435

Where sorting is done on mapper node or reducer node in MapReduce?

686

How to change the replication factor of data which is already stored in HDFS?

What is tungsten in spark?

396

Can we run unix shell commands from the hive? Give example?

758

What is the use of MasterServer?

174

What is CTE Table in Hive?

762

explaine wal in hbase?

173

What are the various modes in which Spark runs on YARN? (Local vs Client vs Cluster Mode)

274

What is the prerequisite for Apache Hive installation?

729

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