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)?

812

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

808

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

927

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?

573

Mention what is apache kafka?

555

Mention what is the traditional method of message transfer?

604

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

657

How many distinct layers are of storm’s codebase?

636

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

587

Un-Answered Questions { Hadoop }

Clarify what combiners are and when you should utilize a combiner in a map reduce job?

649

What is flume instagram?

What does job conf class do?

708

what is distributed cache in mapreduce framework?

729

How blocks are distributed among all data nodes for a particular chunk of data?

1158

How much Metadata will be created on NameNode in Hadoop?

What are the exception handling operators in Pig script?

621

Where is spark rdd?

280

What purpose would an engineer use spark?

422

What is the utility of using Writable Comparable Custom Class in Map Reduce code?

1050

How does speculative execution work in Hadoop?

482

Mention what is data cleansing?

487

What is salary of hadoop developer?

734

What are the important differences between apache and hadoop?

738

Explain the role of the offset?

569

For More Un-Answered { Hadoop } Questions Click Here