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

What is your favourite tool in the hadoop ecosystem?

1007

What is the function of NodeManager?

946

Difference between SQL and HiveQL ?

1 3619

what is pig?

885

What are the steps involved in MapReduce framework?

1045

explain Metadata in Namenode?

981

What is a 'block' in HDFS?

1023

What is Derby database?

956

How many Daemon processes run on a Hadoop system?

1133

What are the limitations of importing RDBMS tables into Hcatalog directly?

992

How the Client communicates with HDFS?

1093

What is NoSQL?

963

What is Row Key?

1033

What is a Task instance in Hadoop? Where does it run?1

884

What does the overwrite keyword denote in Hive load statement?

1 2587

Un-Answered Questions { Hadoop }

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

480

Can you explain accumulators in apache spark?

330

Can you explain worker node?

415

What is hdfs spark?

302

What is spark rdd?

307

If map reduce is inferior to spark then is there any benefit of learning it?

302

What is cloudera and why it is used?

835

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

Explain data versioning?

180

How do I download apache mahout?

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

711

How should you handle session_expired?

What are the components of spark?

293

What is the input type/format in MapReduce by default?

1122

Explain about tajo worker configuration?

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