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

Is the keyword 'DEFINE' like a function name?

993

What is the difference between Cassandra, Pig and Hive?

1049

Does 'ILLUSTRATE' run MR job?

892

What is the use of "order by" in Hive?

1013

What are the different components of a Hive query processor?

1473

If you run hive as a server, what are the available mechanism for connecting it from application?

932

How to use Hive using the command line and Beeline?

983

What is Hive Data Definition language?

1013

How to enable buckets in Hive?

998

What is the difference between external table and managed table?

1015

What are the different Complex Data Types available in Hive?

941

Difference between external table and internal table in HIVE ?

968

When you should use Hbase?

947

What is CONCATENATE command in Hive?

972

What is dynamic partitioning and when is it used?

1104

Un-Answered Questions { Hadoop }

What are the benefits of Spark lazy evaluation?

336

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

476

What is throughput? How does hdfs provides good throughput?

Explain Spark map() transformation?

376

Compare MapReduce and Spark?

310

Is it possible to use Apache Spark for accessing and analyzing data stored in Cassandra databases?

315

What is the usefulness of the distributed by clause in hive?

779

What is the default spark executor memory?

292

What are the libraries of spark sql?

308

Is reduce-only job possible in Hadoop MapReduce?

746

List some commonly used Machine Learning Algorithm Apache Spark?

299

What is bloom filter?

What are the various functions of Spark Core?

348

What are the modules that constitute the Apache Hadoop 2.0 framework?

1048

What is Rack Awareness? What is its need in Hadoop?

571

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