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Hadoop Interview Questions
Questions Answers Views Company eMail

What do you mean by meta data in hdfs? List the files associated with metadata.

 32

Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?

 47

Can you modify the file present in hdfs?

 88

Define data integrity?

 36

What do you mean by the high availability of a namenode? How is it achieved?

 37

Hdfs stores data using commodity hardware which has higher chances of failures. So, how hdfs ensures the fault tolerance capability of the system?

 31

Define hadoop archives?

 29

What is secondary namenode? Is it a substitute or back up node for the namenode?

 58

What is the command for archiving a group of files in hdfs.

 37

Explain the hdfs architecture?

 55

How does hdfs provides good throughput?

 52

Can we have different replication factor of the existing files in hdfs?

 56

How will you perform the inter cluster data copying work in hdfs?

 37

Suppose there is file of size 514 mb stored in hdfs (hadoop 2.x) using default block size configuration and default replication factor. Then, how many blocks will be created in total and what will be the size of each block?

 125

List the files associated with metadata in hdfs?

 34

Un-Answered Questions { Hadoop }

What is the latest version of Ambari that is available in the market?

56

Which companies are mostly using Hive ?

789

What is catalyst query optimizer in apache spark?

293

What are the important modes of hadoop?

538

Mention what is apache kafka?

527

Explain the key features of Spark.

286

Why does the picture of Spark come into existence?

312

What are the different execution mode available in Pig?

1063

Explain the core components of Flume?

109

How Facebook Uses Hadoop, Hive and Hbase ?

713

What are the features of Pseudo mode?

509

What is the relationship between hdfs, hbase, pig, hive and azkaban?

511

What is the role of the ZooKeeper in Kafka?

527

Why aggregation cannot be done in Mapper?

567

How one can change Replication factor when Data is already stored in HDFS

44

For More Un-Answered { Hadoop } Questions Click Here