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

Mention what are the main components of cassandra data model?

Explain what is a cluster in cassandra?

Tell any two features of flume?

116

What will be the result when you do cast(‘abc’ as int)?

775

If you omit the overwrite clause while creating a hive table,what happens to file which are new and files which already exist?

764

How will you convert the string ’51.2’ to a float value in the price column?

893

Can I do transforms or add new functionality?

Why is space not freed up when I issue drop table?

Is avro supported?

Explain what is zookeeper in kafka? Can we use kafka without zookeeper?

540

Mention what is apache kafka?

527

Mention what is the traditional method of message transfer?

579

Mention what is the benefits of apache kafka over the traditional technique?

615

How many distinct layers are of storm’s codebase?

616

Explain how you can improve the throughput of a remote consumer?

558

Un-Answered Questions { Hadoop }

How is the distance between two nodes defined in Hadoop?

1465

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

628

What are the four basic parameters of a mapper?

574

Tunable consistency is supported by Cassandra. Explain.

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

432

Explain the features of pseudo mode?

712

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

719

what is Speculative Execution?

845

What is the purpose of Hive Driver?

1062

what is the Hadoop MapReduce APIs contract for a key and value class?

673

What do you know about nlineoutputformat?

696

Does Hoe Spark handle monitoring and logging in Standalone mode?

277

What is Interceptor?

109

What does name-node mean in hadoop?

483

what is gossip protocol?

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