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

How to restart NameNode or all the daemons in Hadoop?

542

What does jps command do in Hadoop?

651

What is fsck?

643

How to debug Hadoop code?

538

Explain Hadoop streaming?

479

What does hadoop-metrics.properties file do?

529

How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?

422

What are the different commands used to startup and shutdown Hadoop daemons?

527

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

528

How is the splitting of file invoked in Hadoop framework?

513

Is it possible to provide multiple input to Hadoop? If yes then how?

502

Is it possible to have hadoop job output in multiple directories? If yes, how?

452

What is the default replication factor and how will you change it?

533

Explain Hadoop Archives?

535

Explain the Single point of Failure in Hadoop?

477

Un-Answered Questions { Hadoop }

Give any two features of flume?

102

explain Metadata in Namenode?

918

Is spark difficult to learn?

304

Define Thrift?

268

What is the Repository?

Define sparksession in apache spark? Why is it needed?

275

What are the steps to submit a Hadoop job?

906

Explain the functionality of object-inspector.

721

What happens to a NameNode that has no data?

1585

What is REST?

247

Explain about the scalar datatypes in Apache Pig?

896

Does spark use java?

323

What is the difference between sqoop and hive?

What is the default input type in MapReduce?

661

Differentiate between PigLatin and Hive?

689

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