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?

809

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?

574

Mention what is apache kafka?

556

Mention what is the traditional method of message transfer?

605

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

658

How many distinct layers are of storm’s codebase?

637

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

588

Un-Answered Questions { Hadoop }

How many ways we can create rdd in spark?

309

What happens to a NameNode that has no data?

1623

What are the differences between PIG and MapReduce?

628

Which classes are used by the hive to read and write hdfs files?

How can you start the kafka server?

617

On which port does ssh work?

790

Define commit log?

What is pig latin statements?

549

Explian the Limitations of HBase?

199

What are main APIs of Kafka?

681

How apache spark works?

314

Can you explain how you can use Apache Spark along with Hadoop?

323

What is Spark Driver?

322

What are the various configuration parameters required to run a mapreduce job?

721

What are Pig Execution modes?

672

For More Un-Answered { Hadoop } Questions Click Here