If the Hadoop administrator needs to make a change, which configuration file does he need to change? | Hadoop admin questions

It depends on the nature of the change. Each node has it`s own set of configuration files and they are not always the same on each node
Correct Answer is A - Each node in the Hadoop cluster has its own configuration files and the changes needs to be made in every file. One of the reasons for this is that configuration can be different for every node.