Compare Hadoop 2 and Hadoop 3?
When should be hadoop archive create?
What is the difference between a hadoop database and relational database?
What are the features of Pseudo mode?
What is the role of the namenode?
Which one is default?
What is a udf?
How to do ‘map’ and ‘reduce’ works?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
Name the operating system(s) which are supported for production hadoop deployment?
What the information segments utilized by hadoop are?
Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
What is the best practice to deploy the secondary name node?
What are the benefits yarn brings in to hadoop?
What is High Availability feature in Hadoop2?
