Cross cutting concern example

Question

What is a good example of a cross-cutting concern? The medical record example on the wikipedia page seems incomplete to me.

Specifically from this exam

Answer 1

Cross Cutting Concerns are the scenarios which should always be present irrespective of the type of application.

For example Logging, Security, Performance Profiling, Localization, Accessibility, Transaction etc. Irrespective of the Software we are building logging is needed(otherwise how some one will debug or get some relevant information from prod data). Security(authentication/authorization etc.) is needed where only authentic user can enter into the application with right set of privileges. We need to know how your application performs then we need to do profiling. In case application is used by international users(with their own localized language), then we need to support the same in application. Accessibility is usability cases for disabled people to use our application.

Now Irrespective of whether our application is desktop based, web based etc. if it needs to be used by End users across geography in production environment then cross cuts are needed. Till now I haven't said anything about what application is all about etc, but given the list of concerns which should be addressed before releasing it to end users in production environment. and that's all about cross cut concerns(which needs to be handled by all applications/methods/classes i.e at various levels).