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?

587

What does jps command do in Hadoop?

702

What is fsck?

689

How to debug Hadoop code?

572

Explain Hadoop streaming?

513

What does hadoop-metrics.properties file do?

574

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

462

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

586

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

583

How is the splitting of file invoked in Hadoop framework?

569

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

548

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

492

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

583

Explain Hadoop Archives?

584

Explain the Single point of Failure in Hadoop?

514

Un-Answered Questions { Hadoop }

What is executor spark?

315

Explain about the different cluster managers in Apache Spark

352

Who should learn Apache Ambari?

What is parallelize in spark?

306

Explain some Disadvantages of Avro?

What is the function of co-group in Pig?

820

Why comparison of types is important for MapReduce?

1009

What is the use of having Filters in Apache Pig ?

742

What is a row in cassandra? And what are the different elements of it?

What is a sqoop metastore?

How do you define "block" in HDFS?

966

What is avro format?

Can I run Apache Spark without Hadoop?

302

Are multiline comments supported in Hive?

3339

Highlight the difference between group and Cogroup operators in Pig?

908

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