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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.

 36

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

 53

Can you modify the file present in hdfs?

 96

Define data integrity?

 44

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

 47

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

 38

Define hadoop archives?

 37

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

 70

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

 45

Explain the hdfs architecture?

 63

How does hdfs provides good throughput?

 60

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

 66

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

 45

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?

 129

List the files associated with metadata in hdfs?

 40

Un-Answered Questions { Hadoop }

Define the management tools in Cassandra?

89

Differentiate HDFS & HBase?

52

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1139

What is spark tool in big data?

288

Explain combiners.

677

What is the difference between rdd and dataframe in spark?

367

What port does spark use?

330

Define Writable data types in MapReduce?

712

How Sqoop can be used in a Java program?

5

What other technologies have you used in hadoop sta ck?

1016

What is the purpose of JConsole?

81

What is Immutable?

348

What are the two main components of ResourceManager?

1197

What do you mean by the High Availability of a NameNode in Hadoop HDFS?

43

what are the basic parameters of a Mapper?

865

For More Un-Answered { Hadoop } Questions Click Here